20453720980 has 48 divisors (see below), whose sum is σ = 53551564416. Its totient is φ = 6375185280.

The previous prime is 20453720977. The next prime is 20453720999. The reversal of 20453720980 is 8902735402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6639279 + ... + 6642358.

It is an arithmetic number, because the mean of its divisors is an integer number (1115657592).

Almost surely, 2^20453720980 is an apocalyptic number.

20453720980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20453720980 is an abundant number, since it is smaller than the sum of its proper divisors (33097843436).

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

20453720980 is a wasteful number, since it uses less digits than its factorization.

20453720980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13281664 (or 13281662 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 20453720980 in words is "twenty billion, four hundred fifty-three million, seven hundred twenty thousand, nine hundred eighty".