21629298504 has 128 divisors (see below), whose sum is σ = 60206146560. Its totient is φ = 6420000000.

The previous prime is 21629298503. The next prime is 21629298557. The reversal of 21629298504 is 40589292612.

It is not an unprimeable number, because it can be changed into a prime (21629298503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4039429 + ... + 4044779.

It is an arithmetic number, because the mean of its divisors is an integer number (470360520).

Almost surely, 2^21629298504 is an apocalyptic number.

21629298504 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 21629298504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30103073280).

21629298504 is an abundant number, since it is smaller than the sum of its proper divisors (38576848056).

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

21629298504 is a wasteful number, since it uses less digits than its factorization.

21629298504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683 (or 5679 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 21629298504 in words is "twenty-one billion, six hundred twenty-nine million, two hundred ninety-eight thousand, five hundred four".