20774907 has 16 divisors (see below), whose sum is σ = 30866080. Its totient is φ = 13810176.

The previous prime is 20774899. The next prime is 20774909. The reversal of 20774907 is 70947702.

It is not a de Polignac number, because 20774907 - 2³ = 20774899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20774909) 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, 10803 + ... + 12579.

It is an arithmetic number, because the mean of its divisors is an integer number (1929130).

Almost surely, 2^20774907 is an apocalyptic number.

20774907 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20774907 is a deficient number, since it is larger than the sum of its proper divisors (10091173).

20774907 is a wasteful number, since it uses less digits than its factorization.

20774907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219 (or 2213 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 20774907 is about 4557.9498680876. The cubic root of 20774907 is about 274.9031372361.

The spelling of 20774907 in words is "twenty million, seven hundred seventy-four thousand, nine hundred seven".