22157042072 has 64 divisors (see below), whose sum is σ = 48151908000. Its totient is φ = 9446410240.

The previous prime is 22157042051. The next prime is 22157042077. The reversal of 22157042072 is 27024075122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22157042077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413054 + ... + 463602.

Almost surely, 2^22157042072 is an apocalyptic number.

22157042072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22157042072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24075954000).

22157042072 is an abundant number, since it is smaller than the sum of its proper divisors (25994865928).

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

22157042072 is a wasteful number, since it uses less digits than its factorization.

22157042072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50876 (or 50872 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The spelling of 22157042072 in words is "twenty-two billion, one hundred fifty-seven million, forty-two thousand, seventy-two".