20863422840 has 512 divisors, whose sum is σ = 72666316800. Its totient is φ = 4755179520.

The previous prime is 20863422829. The next prime is 20863422851. The reversal of 20863422840 is 4822436802.

It is an interprime number because it is at equal distance from previous prime (20863422829) and next prime (20863422851).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 164278857 + ... + 164278983.

It is an arithmetic number, because the mean of its divisors is an integer number (141926400).

Almost surely, 2^20863422840 is an apocalyptic number.

20863422840 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 20863422840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36333158400).

20863422840 is an abundant number, since it is smaller than the sum of its proper divisors (51802893960).

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

20863422840 is a wasteful number, since it uses less digits than its factorization.

20863422840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The spelling of 20863422840 in words is "twenty billion, eight hundred sixty-three million, four hundred twenty-two thousand, eight hundred forty".