21653372433 has 32 divisors (see below), whose sum is σ = 36035251200. Its totient is φ = 11235994560.

The previous prime is 21653372431. The next prime is 21653372449. The reversal of 21653372433 is 33427335612.

It is not a de Polignac number, because 21653372433 - 2¹ = 21653372431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21653372391 and 21653372400.

It is not an unprimeable number, because it can be changed into a prime (21653372431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157843 + ... + 261191.

It is an arithmetic number, because the mean of its divisors is an integer number (1126101600).

Almost surely, 2^21653372433 is an apocalyptic number.

It is an amenable number.

21653372433 is a deficient number, since it is larger than the sum of its proper divisors (14381878767).

21653372433 is a wasteful number, since it uses less digits than its factorization.

21653372433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104277.

The product of its digits is 272160, while the sum is 39.

The spelling of 21653372433 in words is "twenty-one billion, six hundred fifty-three million, three hundred seventy-two thousand, four hundred thirty-three".