20770079 has 4 divisors (see below), whose sum is σ = 22658280. Its totient is φ = 18881880.

The previous prime is 20770049. The next prime is 20770109. The reversal of 20770079 is 97007702.

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

It is an interprime number because it is at equal distance from previous prime (20770049) and next prime (20770109).

It is a cyclic number.

It is not a de Polignac number, because 20770079 - 2⁸ = 20769823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770049) 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, 944084 + ... + 944105.

It is an arithmetic number, because the mean of its divisors is an integer number (5664570).

Almost surely, 2^20770079 is an apocalyptic number.

20770079 is a deficient number, since it is larger than the sum of its proper divisors (1888201).

20770079 is a wasteful number, since it uses less digits than its factorization.

20770079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888200.

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 20770079 is about 4557.4202132347. The cubic root of 20770079 is about 274.8818401464.

The spelling of 20770079 in words is "twenty million, seven hundred seventy thousand, seventy-nine".