20077679 has 4 divisors (see below), whose sum is σ = 20092800. Its totient is φ = 20062560.

The previous prime is 20077639. The next prime is 20077693. The reversal of 20077679 is 97677002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20077679 - 2⁸ = 20077423 is a prime.

It is a super-2 number, since 2×20077679² = 806226388054082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077639) 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, 5354 + ... + 8295.

It is an arithmetic number, because the mean of its divisors is an integer number (5023200).

Almost surely, 2^20077679 is an apocalyptic number.

20077679 is a deficient number, since it is larger than the sum of its proper divisors (15121).

20077679 is a wasteful number, since it uses less digits than its factorization.

20077679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15120.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 20077679 is about 4480.8123147483. The cubic root of 20077679 is about 271.7927297468.

The spelling of 20077679 in words is "twenty million, seventy-seven thousand, six hundred seventy-nine".