21473962488 has 384 divisors, whose sum is σ = 73356192000. Its totient is φ = 5800273920.

The previous prime is 21473962483. The next prime is 21473962541. The reversal of 21473962488 is 88426937412.

21473962488 is a `hidden beast` number, since 2 + 1 + 4 + 7 + 3 + 9 + 624 + 8 + 8 = 666.

It is a super-2 number, since 2×21473962488² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21473962481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6905478 + ... + 6908586.

It is an arithmetic number, because the mean of its divisors is an integer number (191031750).

Almost surely, 2^21473962488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21473962488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36678096000).

21473962488 is an abundant number, since it is smaller than the sum of its proper divisors (51882229512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21473962488 is a wasteful number, since it uses less digits than its factorization.

21473962488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177 (or 3161 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 21473962488 in words is "twenty-one billion, four hundred seventy-three million, nine hundred sixty-two thousand, four hundred eighty-eight".