20477051 has 6 divisors (see below), whose sum is σ = 23820300. Its totient is φ = 17551716.

The previous prime is 20476933. The next prime is 20477053. The reversal of 20477051 is 15077402.

It is a de Polignac number, because none of the positive numbers 2^k-20477051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20477051.

It is not an unprimeable number, because it can be changed into a prime (20477053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208901 + ... + 208998.

It is an arithmetic number, because the mean of its divisors is an integer number (3970050).

Almost surely, 2^20477051 is an apocalyptic number.

20477051 is a deficient number, since it is larger than the sum of its proper divisors (3343249).

20477051 is an equidigital number, since it uses as much as digits as its factorization.

20477051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417913 (or 417906 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 20477051 is about 4525.1575663174. The cubic root of 20477051 is about 273.5830187570.

The spelling of 20477051 in words is "twenty million, four hundred seventy-seven thousand, fifty-one".