20745910 has 32 divisors (see below), whose sum is σ = 39644640. Its totient is φ = 7794432.

The previous prime is 20745883. The next prime is 20745911. The reversal of 20745910 is 1954702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20745911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25632 + ... + 26428.

It is an arithmetic number, because the mean of its divisors is an integer number (1238895).

Almost surely, 2^20745910 is an apocalyptic number.

20745910 is a deficient number, since it is larger than the sum of its proper divisors (18898730).

20745910 is a wasteful number, since it uses less digits than its factorization.

20745910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20745910 is about 4554.7678316244. The cubic root of 20745910 is about 274.7751771305.

The spelling of 20745910 in words is "twenty million, seven hundred forty-five thousand, nine hundred ten".