20501948560 has 40 divisors (see below), whose sum is σ = 47678823360. Its totient is φ = 8198750592.

The previous prime is 20501948503. The next prime is 20501948567. The reversal of 20501948560 is 6584910502.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (20501948567) 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, 317589 + ... + 376651.

It is an arithmetic number, because the mean of its divisors is an integer number (1191970584).

Almost surely, 2^20501948560 is an apocalyptic number.

20501948560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20501948560 is an abundant number, since it is smaller than the sum of its proper divisors (27176874800).

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

20501948560 is a wasteful number, since it uses less digits than its factorization.

20501948560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63415 (or 63409 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 20501948560 in words is "twenty billion, five hundred one million, nine hundred forty-eight thousand, five hundred sixty".