21329570704 has 80 divisors (see below), whose sum is σ = 45689700672. Its totient is φ = 9583870464.

The previous prime is 21329570701. The next prime is 21329570707. The reversal of 21329570704 is 40707592312.

It is an interprime number because it is at equal distance from previous prime (21329570701) and next prime (21329570707).

It is not an unprimeable number, because it can be changed into a prime (21329570701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2831487 + ... + 2839009.

Almost surely, 2^21329570704 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 21329570704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22844850336).

21329570704 is an abundant number, since it is smaller than the sum of its proper divisors (24360129968).

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

21329570704 is a wasteful number, since it uses less digits than its factorization.

21329570704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7904 (or 7898 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

It can be divided in two parts, 2132 and 9570704, that added together give a square (9572836 = 3094²).

The spelling of 21329570704 in words is "twenty-one billion, three hundred twenty-nine million, five hundred seventy thousand, seven hundred four".