21476702618904 has 512 divisors, whose sum is σ = 63875750400000. Its totient is φ = 5957288902656.

The previous prime is 21476702618887. The next prime is 21476702618953. The reversal of 21476702618904 is 40981620767412.

It is a super-2 number, since 2×21476702618904² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10280852292 + ... + 10280854380.

It is an arithmetic number, because the mean of its divisors is an integer number (124757325000).

Almost surely, 2^{21476702618904} is an apocalyptic number.

21476702618904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21476702618904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31937875200000).

21476702618904 is an abundant number, since it is smaller than the sum of its proper divisors (42399047781096).

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

21476702618904 is a wasteful number, since it uses less digits than its factorization.

21476702618904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 57.

The spelling of 21476702618904 in words is "twenty-one trillion, four hundred seventy-six billion, seven hundred two million, six hundred eighteen thousand, nine hundred four".