20900663480 has 128 divisors (see below), whose sum is σ = 50837068800. Its totient is φ = 7707571200.

The previous prime is 20900663479. The next prime is 20900663561. The reversal of 20900663480 is 8436600902.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19661429 + ... + 19662491.

It is an arithmetic number, because the mean of its divisors is an integer number (397164600).

Almost surely, 2^20900663480 is an apocalyptic number.

20900663480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20900663480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25418534400).

20900663480 is an abundant number, since it is smaller than the sum of its proper divisors (29936405320).

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

20900663480 is a wasteful number, since it uses less digits than its factorization.

20900663480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 20900663480 in words is "twenty billion, nine hundred million, six hundred sixty-three thousand, four hundred eighty".