21072407330 has 32 divisors (see below), whose sum is σ = 42997953600. Its totient is φ = 7371076032.

The previous prime is 21072407303. The next prime is 21072407333. The reversal of 21072407330 is 3370427012.

It is a junction number, because it is equal to n+sod(n) for n = 21072407293 and 21072407302.

It is not an unprimeable number, because it can be changed into a prime (21072407333) 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, 4263200 + ... + 4268139.

It is an arithmetic number, because the mean of its divisors is an integer number (1343686050).

Almost surely, 2^21072407330 is an apocalyptic number.

21072407330 is an abundant number, since it is smaller than the sum of its proper divisors (21925546270).

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

21072407330 is a wasteful number, since it uses less digits than its factorization.

21072407330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8531378.

The product of its (nonzero) digits is 7056, while the sum is 29.

The spelling of 21072407330 in words is "twenty-one billion, seventy-two million, four hundred seven thousand, three hundred thirty".