20907946 has 8 divisors (see below), whose sum is σ = 31457664. Its totient is φ = 10422060.

The previous prime is 20907941. The next prime is 20907947. The reversal of 20907946 is 64970902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20907941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15130 + ... + 16453.

It is an arithmetic number, because the mean of its divisors is an integer number (3932208).

Almost surely, 2^20907946 is an apocalyptic number.

20907946 is a deficient number, since it is larger than the sum of its proper divisors (10549718).

20907946 is a wasteful number, since it uses less digits than its factorization.

20907946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31916.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 20907946 is about 4572.5207489961. The cubic root of 20907946 is about 275.4887001666.

The spelling of 20907946 in words is "twenty million, nine hundred seven thousand, nine hundred forty-six".