20269977 has 24 divisors (see below), whose sum is σ = 33860736. Its totient is φ = 10690848.

The previous prime is 20269961. The next prime is 20269999. The reversal of 20269977 is 77996202.

It is not a de Polignac number, because 20269977 - 2⁴ = 20269961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20269177) 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, 3393 + ... + 7214.

It is an arithmetic number, because the mean of its divisors is an integer number (1410864).

Almost surely, 2^20269977 is an apocalyptic number.

It is an amenable number.

20269977 is a deficient number, since it is larger than the sum of its proper divisors (13590759).

20269977 is a wasteful number, since it uses less digits than its factorization.

20269977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10637 (or 10630 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 20269977 is about 4502.2191195010. The cubic root of 20269977 is about 272.6576906225.

The spelling of 20269977 in words is "twenty million, two hundred sixty-nine thousand, nine hundred seventy-seven".