20477079 has 24 divisors (see below), whose sum is σ = 35584640. Its totient is φ = 11084688.

The previous prime is 20477077. The next prime is 20477089. The reversal of 20477079 is 97077402.

It is not a de Polignac number, because 20477079 - 2¹ = 20477077 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20477077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7357 + ... + 9750.

Almost surely, 2^20477079 is an apocalyptic number.

20477079 is a deficient number, since it is larger than the sum of its proper divisors (15107561).

20477079 is a wasteful number, since it uses less digits than its factorization.

20477079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17139 (or 17136 counting only the distinct ones).

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

The square root of 20477079 is about 4525.1606601313. The cubic root of 20477079 is about 273.5831434547.

The spelling of 20477079 in words is "twenty million, four hundred seventy-seven thousand, seventy-nine".