20462977 has 8 divisors (see below), whose sum is σ = 21038472. Its totient is φ = 19891200.

The previous prime is 20462933. The next prime is 20462983. The reversal of 20462977 is 77926402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41616 + 20421361 = 204^2 + 4519^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20462977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20460977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13077 + ... + 14557.

It is an arithmetic number, because the mean of its divisors is an integer number (2629809).

Almost surely, 2^20462977 is an apocalyptic number.

It is an amenable number.

20462977 is a deficient number, since it is larger than the sum of its proper divisors (575495).

20462977 is a wasteful number, since it uses less digits than its factorization.

20462977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 20462977 is about 4523.6022150494. The cubic root of 20462977 is about 273.5203259751.

The spelling of 20462977 in words is "twenty million, four hundred sixty-two thousand, nine hundred seventy-seven".