21352226157 has 32 divisors (see below), whose sum is σ = 33775948800. Its totient is φ = 13299246576.

The previous prime is 21352226153. The next prime is 21352226167. The reversal of 21352226157 is 75162225312.

21352226157 is a `hidden beast` number, since 2 + 1 + 35 + 2 + 2 + 2 + 615 + 7 = 666.

It is not a de Polignac number, because 21352226157 - 2² = 21352226153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352226153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373107 + ... + 426512.

It is an arithmetic number, because the mean of its divisors is an integer number (1055498400).

Almost surely, 2^21352226157 is an apocalyptic number.

21352226157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21352226157 is a deficient number, since it is larger than the sum of its proper divisors (12423722643).

21352226157 is a wasteful number, since it uses less digits than its factorization.

21352226157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799694 (or 799688 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The spelling of 21352226157 in words is "twenty-one billion, three hundred fifty-two million, two hundred twenty-six thousand, one hundred fifty-seven".