20623960 has 64 divisors (see below), whose sum is σ = 53812800. Its totient is φ = 6967296.

The previous prime is 20623957. The next prime is 20623973. The reversal of 20623960 is 6932602.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19936 + ... + 20944.

It is an arithmetic number, because the mean of its divisors is an integer number (840825).

Almost surely, 2^20623960 is an apocalyptic number.

20623960 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 20623960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26906400).

20623960 is an abundant number, since it is smaller than the sum of its proper divisors (33188840).

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

20623960 is a wasteful number, since it uses less digits than its factorization.

20623960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20623960 is about 4541.3610294712. The cubic root of 20623960 is about 274.2357180906.

The spelling of 20623960 in words is "twenty million, six hundred twenty-three thousand, nine hundred sixty".