20701131 has 16 divisors (see below), whose sum is σ = 30334080. Its totient is φ = 12453120.

The previous prime is 20701129. The next prime is 20701139. The reversal of 20701131 is 13110702.

It is not a de Polignac number, because 20701131 - 2¹ = 20701129 is a prime.

It is a super-2 number, since 2×20701131² = 857073649358322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20701131.

It is not an unprimeable number, because it can be changed into a prime (20701139) 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, 2331 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (1895880).

Almost surely, 2^20701131 is an apocalyptic number.

20701131 is a deficient number, since it is larger than the sum of its proper divisors (9632949).

20701131 is a wasteful number, since it uses less digits than its factorization.

20701131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4666.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 20701131 is about 4549.8495579524. The cubic root of 20701131 is about 274.5773386019.

Adding to 20701131 its reverse (13110702), we get a palindrome (33811833).

The spelling of 20701131 in words is "twenty million, seven hundred one thousand, one hundred thirty-one".