20465939 has 8 divisors (see below), whose sum is σ = 22075872. Its totient is φ = 18861120.

The previous prime is 20465917. The next prime is 20465941. The reversal of 20465939 is 93956402.

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

It is a cyclic number.

It is not a de Polignac number, because 20465939 - 2¹² = 20461843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20465969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13079 + ... + 14559.

It is an arithmetic number, because the mean of its divisors is an integer number (2759484).

Almost surely, 2^20465939 is an apocalyptic number.

20465939 is a deficient number, since it is larger than the sum of its proper divisors (1609933).

20465939 is a wasteful number, since it uses less digits than its factorization.

20465939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 20465939 is about 4523.9295971533. The cubic root of 20465939 is about 273.5335226231.

The spelling of 20465939 in words is "twenty million, four hundred sixty-five thousand, nine hundred thirty-nine".