20863967740 has 432 divisors, whose sum is σ = 60995634336. Its totient is φ = 5922201600.

The previous prime is 20863967737. The next prime is 20863967767. The reversal of 20863967740 is 4776936802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 115270450 + ... + 115270630.

It is an arithmetic number, because the mean of its divisors is an integer number (141193598).

Almost surely, 2^20863967740 is an apocalyptic number.

20863967740 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 20863967740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30497817168).

20863967740 is an abundant number, since it is smaller than the sum of its proper divisors (40131666596).

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

20863967740 is a wasteful number, since it uses less digits than its factorization.

20863967740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 20863967740 in words is "twenty billion, eight hundred sixty-three million, nine hundred sixty-seven thousand, seven hundred forty".