21192230157 has 12 divisors (see below), whose sum is σ = 32869581696. Its totient is φ = 12109845720.

The previous prime is 21192230117. The next prime is 21192230159. The reversal of 21192230157 is 75103229112.

It is not a de Polignac number, because 21192230157 - 2¹⁴ = 21192213773 is a prime.

It is a super-2 number, since 2×21192230157² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192230159) 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 11 ways as a sum of consecutive naturals, for example, 72082269 + ... + 72082562.

It is an arithmetic number, because the mean of its divisors is an integer number (2739131808).

Almost surely, 2^21192230157 is an apocalyptic number.

It is an amenable number.

21192230157 is a deficient number, since it is larger than the sum of its proper divisors (11677351539).

21192230157 is a wasteful number, since it uses less digits than its factorization.

21192230157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144164848 (or 144164841 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

Adding to 21192230157 its reverse (75103229112), we get a palindrome (96295459269).

The spelling of 21192230157 in words is "twenty-one billion, one hundred ninety-two million, two hundred thirty thousand, one hundred fifty-seven".