22156198029 has 20 divisors (see below), whose sum is σ = 37825749984. Its totient is φ = 12660684264.

The previous prime is 22156198027. The next prime is 22156198111. The reversal of 22156198029 is 92089165122.

It is a happy number.

22156198029 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 619 + 8 + 0 + 29 = 666.

It is not a de Polignac number, because 22156198029 - 2¹ = 22156198027 is a prime.

It is a super-2 number, since 2×22156198029² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22156198027) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19537527 + ... + 19538660.

Almost surely, 2^22156198029 is an apocalyptic number.

It is an amenable number.

22156198029 is a deficient number, since it is larger than the sum of its proper divisors (15669551955).

22156198029 is an equidigital number, since it uses as much as digits as its factorization.

22156198029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39076206 (or 39076197 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 22156198029 in words is "twenty-two billion, one hundred fifty-six million, one hundred ninety-eight thousand, twenty-nine".