20892047 has 16 divisors (see below), whose sum is σ = 23721984. Its totient is φ = 18228000.

The previous prime is 20892043. The next prime is 20892061. The reversal of 20892047 is 74029802.

It is not a de Polignac number, because 20892047 - 2² = 20892043 is a prime.

It is a super-3 number, since 3×20892047³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20892041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67022 + ... + 67332.

It is an arithmetic number, because the mean of its divisors is an integer number (1482624).

Almost surely, 2^20892047 is an apocalyptic number.

20892047 is a deficient number, since it is larger than the sum of its proper divisors (2829937).

20892047 is a wasteful number, since it uses less digits than its factorization.

20892047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20892047 is about 4570.7818805977. The cubic root of 20892047 is about 275.4188526306.

The spelling of 20892047 in words is "twenty million, eight hundred ninety-two thousand, forty-seven".