20696392 has 8 divisors (see below), whose sum is σ = 38805750. Its totient is φ = 10348192.

The previous prime is 20696387. The next prime is 20696399. The reversal of 20696392 is 29369602.

It can be written as a sum of positive squares in only one way, i.e., 20666116 + 30276 = 4546^2 + 174^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20696399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1293517 + ... + 1293532.

Almost surely, 2^20696392 is an apocalyptic number.

It is an amenable number.

20696392 is a deficient number, since it is larger than the sum of its proper divisors (18109358).

20696392 is a wasteful number, since it uses less digits than its factorization.

20696392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587055 (or 2587051 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 20696392 is about 4549.3287416937. The cubic root of 20696392 is about 274.5563844922.

The spelling of 20696392 in words is "twenty million, six hundred ninety-six thousand, three hundred ninety-two".