20693568 has 112 divisors (see below), whose sum is σ = 63642240. Its totient is φ = 5812224.

The previous prime is 20693551. The next prime is 20693591. The reversal of 20693568 is 86539602.

It is a tau number, because it is divible by the number of its divisors (112).

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, 119530 + ... + 119702.

Almost surely, 2^20693568 is an apocalyptic number.

20693568 is a gapful number since it is divisible by the number (28) 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 20693568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31821120).

20693568 is an abundant number, since it is smaller than the sum of its proper divisors (42948672).

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

20693568 is a wasteful number, since it uses less digits than its factorization.

20693568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 20693568 is about 4549.0183556455. The cubic root of 20693568 is about 274.5438962849.

The spelling of 20693568 in words is "twenty million, six hundred ninety-three thousand, five hundred sixty-eight".