20237091 has 16 divisors (see below), whose sum is σ = 30902784. Its totient is φ = 11539584.

The previous prime is 20237053. The next prime is 20237093. The reversal of 20237091 is 19073202.

It is not a de Polignac number, because 20237091 - 2¹¹ = 20235043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20237093) 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, 14955 + ... + 16251.

It is an arithmetic number, because the mean of its divisors is an integer number (1931424).

Almost surely, 2^20237091 is an apocalyptic number.

20237091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20237091 is a deficient number, since it is larger than the sum of its proper divisors (10665693).

20237091 is a wasteful number, since it uses less digits than its factorization.

20237091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20237091 is about 4498.5654380035. The cubic root of 20237091 is about 272.5101575766.

The spelling of 20237091 in words is "twenty million, two hundred thirty-seven thousand, ninety-one".