20752113 has 16 divisors (see below), whose sum is σ = 28717056. Its totient is φ = 13315920.

The previous prime is 20752091. The next prime is 20752133. The reversal of 20752113 is 31125702.

It is not a de Polignac number, because 20752113 - 2¹⁰ = 20751089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20752113.

It is not an unprimeable number, because it can be changed into a prime (20752133) 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, 20620 + ... + 21602.

It is an arithmetic number, because the mean of its divisors is an integer number (1794816).

Almost surely, 2^20752113 is an apocalyptic number.

It is an amenable number.

20752113 is a deficient number, since it is larger than the sum of its proper divisors (7964943).

20752113 is a wasteful number, since it uses less digits than its factorization.

20752113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20752113 is about 4555.4487155493. The cubic root of 20752113 is about 274.8025602079.

Adding to 20752113 its reverse (31125702), we get a palindrome (51877815).

The spelling of 20752113 in words is "twenty million, seven hundred fifty-two thousand, one hundred thirteen".