20274779 has 24 divisors (see below), whose sum is σ = 24796368. Its totient is φ = 16511040.

The previous prime is 20274773. The next prime is 20274791. The reversal of 20274779 is 97747202.

It is a de Polignac number, because none of the positive numbers 2^k-20274779 is a prime.

It is a super-2 number, since 2×20274779² = 822133326997682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20274773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95984 + ... + 96194.

It is an arithmetic number, because the mean of its divisors is an integer number (1033182).

Almost surely, 2^20274779 is an apocalyptic number.

20274779 is a deficient number, since it is larger than the sum of its proper divisors (4521589).

20274779 is a wasteful number, since it uses less digits than its factorization.

20274779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 20274779 is about 4502.7523804891. The cubic root of 20274779 is about 272.6792199817.

The spelling of 20274779 in words is "twenty million, two hundred seventy-four thousand, seven hundred seventy-nine".