21235760304 has 40 divisors (see below), whose sum is σ = 59846235072. Its totient is φ = 6435078720.

The previous prime is 21235760303. The next prime is 21235760309. The reversal of 21235760304 is 40306753212.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (21235760303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20109094 + ... + 20110149.

Almost surely, 2^21235760304 is an apocalyptic number.

21235760304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21235760304 is an abundant number, since it is smaller than the sum of its proper divisors (38610474768).

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

21235760304 is a wasteful number, since it uses less digits than its factorization.

21235760304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40219265 (or 40219259 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 21235760304 in words is "twenty-one billion, two hundred thirty-five million, seven hundred sixty thousand, three hundred four".