20813248880 has 40 divisors (see below), whose sum is σ = 49698670272. Its totient is φ = 8100290304.

The previous prime is 20813248879. The next prime is 20813248889. The reversal of 20813248880 is 8884231802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20813248889) 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, 3512792 + ... + 3518711.

Almost surely, 2^20813248880 is an apocalyptic number.

20813248880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20813248880 is an abundant number, since it is smaller than the sum of its proper divisors (28885421392).

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

20813248880 is a wasteful number, since it uses less digits than its factorization.

20813248880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031553 (or 7031547 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 20813248880 in words is "twenty billion, eight hundred thirteen million, two hundred forty-eight thousand, eight hundred eighty".