20973365 has 16 divisors (see below), whose sum is σ = 29023488. Its totient is φ = 14251776.

The previous prime is 20973349. The next prime is 20973367. The reversal of 20973365 is 56337902.

It is not a de Polignac number, because 20973365 - 2⁴ = 20973349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20973367) 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, 1304 + ... + 6606.

It is an arithmetic number, because the mean of its divisors is an integer number (1813968).

Almost surely, 2^20973365 is an apocalyptic number.

It is an amenable number.

20973365 is a deficient number, since it is larger than the sum of its proper divisors (8050123).

20973365 is a wasteful number, since it uses less digits than its factorization.

20973365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5428.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 20973365 is about 4579.6686561366. The cubic root of 20973365 is about 275.7757271068.

The spelling of 20973365 in words is "twenty million, nine hundred seventy-three thousand, three hundred sixty-five".