21423425162188 has 18 divisors (see below), whose sum is σ = 43611972651996. Its totient is φ = 9181467926568.

The previous prime is 21423425162093. The next prime is 21423425162197. The reversal of 21423425162188 is 88126152432412.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54651594606 + ... + 54651594997.

Almost surely, 2^{21423425162188} is an apocalyptic number.

21423425162188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21423425162188 is an abundant number, since it is smaller than the sum of its proper divisors (22188547489808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21423425162188 is a wasteful number, since it uses less digits than its factorization.

21423425162188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109303189621 (or 109303189612 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 49.

The spelling of 21423425162188 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-five million, one hundred sixty-two thousand, one hundred eighty-eight".