21141982620 has 72 divisors (see below), whose sum is σ = 69960749040. Its totient is φ = 5125328640.

The previous prime is 21141982591. The next prime is 21141982627. The reversal of 21141982620 is 2628914112.

21141982620 is a `hidden beast` number, since 2 + 1 + 14 + 19 + 8 + 2 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141982627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5336905 + ... + 5340864.

It is an arithmetic number, because the mean of its divisors is an integer number (971677070).

Almost surely, 2^21141982620 is an apocalyptic number.

21141982620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21141982620 is an abundant number, since it is smaller than the sum of its proper divisors (48818766420).

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

21141982620 is a wasteful number, since it uses less digits than its factorization.

21141982620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10677795 (or 10677790 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 21141982620 in words is "twenty-one billion, one hundred forty-one million, nine hundred eighty-two thousand, six hundred twenty".