20233621980 has 144 divisors (see below), whose sum is σ = 72105362784. Its totient is φ = 4527797760.

The previous prime is 20233621979. The next prime is 20233621999. The reversal of 20233621980 is 8912633202.

20233621980 is a `hidden beast` number, since 2 + 0 + 23 + 3 + 621 + 9 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 367299 + ... + 418778.

It is an arithmetic number, because the mean of its divisors is an integer number (500731686).

Almost surely, 2^20233621980 is an apocalyptic number.

20233621980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20233621980 is an abundant number, since it is smaller than the sum of its proper divisors (51871740804).

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

20233621980 is a wasteful number, since it uses less digits than its factorization.

20233621980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786116 (or 786111 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 20233621980 in words is "twenty billion, two hundred thirty-three million, six hundred twenty-one thousand, nine hundred eighty".