20489376738 has 16 divisors (see below), whose sum is σ = 40981518720. Its totient is φ = 6829331376.

The previous prime is 20489376737. The next prime is 20489376751. The reversal of 20489376738 is 83767398402.

It is a super-2 number, since 2×20489376738² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20489376737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11745 + ... + 202772.

It is an arithmetic number, because the mean of its divisors is an integer number (2561344920).

Almost surely, 2^20489376738 is an apocalyptic number.

20489376738 is an abundant number, since it is smaller than the sum of its proper divisors (20492141982).

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

20489376738 is a wasteful number, since it uses less digits than its factorization.

20489376738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230441.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 20489376738 in words is "twenty billion, four hundred eighty-nine million, three hundred seventy-six thousand, seven hundred thirty-eight".