21933020475 has 72 divisors (see below), whose sum is σ = 42380537472. Its totient is φ = 10801689600.

The previous prime is 21933020467. The next prime is 21933020477. The reversal of 21933020475 is 57402033912.

It is not a de Polignac number, because 21933020475 - 2³ = 21933020467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21933020477) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 148630 + ... + 256820.

It is an arithmetic number, because the mean of its divisors is an integer number (588618576).

Almost surely, 2^21933020475 is an apocalyptic number.

21933020475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21933020475 is a deficient number, since it is larger than the sum of its proper divisors (20447516997).

21933020475 is a wasteful number, since it uses less digits than its factorization.

21933020475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108277 (or 108269 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 21933020475 in words is "twenty-one billion, nine hundred thirty-three million, twenty thousand, four hundred seventy-five".