20369847 has 16 divisors (see below), whose sum is σ = 28131840. Its totient is φ = 13102272.

The previous prime is 20369819. The next prime is 20369851. The reversal of 20369847 is 74896302.

It is not a de Polignac number, because 20369847 - 2¹⁶ = 20304311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20369807) 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, 9304 + ... + 11282.

It is an arithmetic number, because the mean of its divisors is an integer number (1758240).

Almost surely, 2^20369847 is an apocalyptic number.

20369847 is a deficient number, since it is larger than the sum of its proper divisors (7761993).

20369847 is a wasteful number, since it uses less digits than its factorization.

20369847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20369847 is about 4513.2966886745. The cubic root of 20369847 is about 273.1047512249.

The spelling of 20369847 in words is "twenty million, three hundred sixty-nine thousand, eight hundred forty-seven".