20443746 has 16 divisors (see below), whose sum is σ = 41068800. Its totient is φ = 6784368.

The previous prime is 20443727. The next prime is 20443763. The reversal of 20443746 is 64734402.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6066 + ... + 8813.

It is an arithmetic number, because the mean of its divisors is an integer number (2566800).

Almost surely, 2^20443746 is an apocalyptic number.

20443746 is an abundant number, since it is smaller than the sum of its proper divisors (20625054).

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

20443746 is a wasteful number, since it uses less digits than its factorization.

20443746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15113.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 20443746 is about 4521.4760864125. The cubic root of 20443746 is about 273.4346147897.

The spelling of 20443746 in words is "twenty million, four hundred forty-three thousand, seven hundred forty-six".