20753613 has 24 divisors (see below), whose sum is σ = 31606848. Its totient is φ = 13096512.

The previous prime is 20753611. The next prime is 20753627. The reversal of 20753613 is 31635702.

It is a happy number.

It is not a de Polignac number, because 20753613 - 2¹ = 20753611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20753611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21681 + ... + 22617.

It is an arithmetic number, because the mean of its divisors is an integer number (1316952).

Almost surely, 2^20753613 is an apocalyptic number.

20753613 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20753613 is a deficient number, since it is larger than the sum of its proper divisors (10853235).

20753613 is a wasteful number, since it uses less digits than its factorization.

20753613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20753613 is about 4555.6133505819. The cubic root of 20753613 is about 274.8091811225.

The spelling of 20753613 in words is "twenty million, seven hundred fifty-three thousand, six hundred thirteen".