21293917330 has 16 divisors (see below), whose sum is σ = 43804630080. Its totient is φ = 7300771632.

The previous prime is 21293917321. The next prime is 21293917331. The reversal of 21293917330 is 3371939212.

It is not an unprimeable number, because it can be changed into a prime (21293917331) 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, 152099340 + ... + 152099479.

It is an arithmetic number, because the mean of its divisors is an integer number (2737789380).

Almost surely, 2^21293917330 is an apocalyptic number.

21293917330 is an abundant number, since it is smaller than the sum of its proper divisors (22510712750).

21293917330 is a wasteful number, since it uses less digits than its factorization.

21293917330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304198833.

The product of its (nonzero) digits is 61236, while the sum is 40.

The spelling of 21293917330 in words is "twenty-one billion, two hundred ninety-three million, nine hundred seventeen thousand, three hundred thirty".