20469568 has 28 divisors (see below), whose sum is σ = 46423072. Its totient is φ = 8772480.

The previous prime is 20469551. The next prime is 20469571. The reversal of 20469568 is 86596402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a self number, because there is not a number n which added to its sum of digits gives 20469568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22398 + ... + 23293.

Almost surely, 2^20469568 is an apocalyptic number.

20469568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20469568 is an abundant number, since it is smaller than the sum of its proper divisors (25953504).

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

20469568 is an equidigital number, since it uses as much as digits as its factorization.

20469568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45710 (or 45700 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 20469568 is about 4524.3306687288. The cubic root of 20469568 is about 273.5496892319.

The spelling of 20469568 in words is "twenty million, four hundred sixty-nine thousand, five hundred sixty-eight".