21474488826 has 288 divisors, whose sum is σ = 61028997120. Its totient is φ = 5621464800.

The previous prime is 21474488813. The next prime is 21474488843. The reversal of 21474488826 is 62888447412.

21474488826 is a `hidden beast` number, since 2 + 14 + 74 + 488 + 82 + 6 = 666.

It is a super-2 number, since 2×21474488826² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14025681 + ... + 14027211.

It is an arithmetic number, because the mean of its divisors is an integer number (211906240).

Almost surely, 2^21474488826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21474488826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30514498560).

21474488826 is an abundant number, since it is smaller than the sum of its proper divisors (39554508294).

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

21474488826 is a wasteful number, since it uses less digits than its factorization.

21474488826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1593 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 54.

The spelling of 21474488826 in words is "twenty-one billion, four hundred seventy-four million, four hundred eighty-eight thousand, eight hundred twenty-six".