20501623480 has 64 divisors (see below), whose sum is σ = 50235292800. Its totient is φ = 7484759040.

The previous prime is 20501623427. The next prime is 20501623487. The reversal of 20501623480 is 8432610502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20501623487) 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, 175216 + ... + 267775.

It is an arithmetic number, because the mean of its divisors is an integer number (784926450).

Almost surely, 2^20501623480 is an apocalyptic number.

20501623480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20501623480 is an abundant number, since it is smaller than the sum of its proper divisors (29733669320).

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

20501623480 is a wasteful number, since it uses less digits than its factorization.

20501623480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443104 (or 443100 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 20501623480 in words is "twenty billion, five hundred one million, six hundred twenty-three thousand, four hundred eighty".