20933490156 has 48 divisors (see below), whose sum is σ = 50436664320. Its totient is φ = 6750567360.

The previous prime is 20933490139. The next prime is 20933490157. The reversal of 20933490156 is 65109433902.

It is a happy number.

It is a super-2 number, since 2×20933490156² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20933490157) 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, 1476855 + ... + 1490961.

It is an arithmetic number, because the mean of its divisors is an integer number (1050763840).

Almost surely, 2^20933490156 is an apocalyptic number.

It is an amenable number.

20933490156 is an abundant number, since it is smaller than the sum of its proper divisors (29503174164).

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

20933490156 is a wasteful number, since it uses less digits than its factorization.

20933490156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18134 (or 18132 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The spelling of 20933490156 in words is "twenty billion, nine hundred thirty-three million, four hundred ninety thousand, one hundred fifty-six".