20963920860 has 108 divisors (see below), whose sum is σ = 66475877832. Its totient is φ = 5347294656.

The previous prime is 20963920853. The next prime is 20963920871. The reversal of 20963920860 is 6802936902.

20963920860 is a `hidden beast` number, since 2 + 0 + 9 + 639 + 2 + 0 + 8 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14862 + ... + 205301.

Almost surely, 2^20963920860 is an apocalyptic number.

20963920860 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 20963920860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33237938916).

20963920860 is an abundant number, since it is smaller than the sum of its proper divisors (45511956972).

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

20963920860 is a wasteful number, since it uses less digits than its factorization.

20963920860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220224 (or 220196 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 20963920860 in words is "twenty billion, nine hundred sixty-three million, nine hundred twenty thousand, eight hundred sixty".