20868959232 has 440 divisors, whose sum is σ = 69015505680. Its totient is φ = 6228541440.

The previous prime is 20868959227. The next prime is 20868959269. The reversal of 20868959232 is 23295986802.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 81202048 + ... + 81202304.

It is an arithmetic number, because the mean of its divisors is an integer number (156853422).

Almost surely, 2^20868959232 is an apocalyptic number.

20868959232 is a gapful number since it is divisible by the number (22) 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 20868959232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34507752840).

20868959232 is an abundant number, since it is smaller than the sum of its proper divisors (48146546448).

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

20868959232 is a wasteful number, since it uses less digits than its factorization.

20868959232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

It can be divided in two parts, 20868 and 959232, that added together give a square (980100 = 990²).

The spelling of 20868959232 in words is "twenty billion, eight hundred sixty-eight million, nine hundred fifty-nine thousand, two hundred thirty-two".