20753456 has 10 divisors (see below), whose sum is σ = 40209852. Its totient is φ = 10376720.

The previous prime is 20753449. The next prime is 20753459. The reversal of 20753456 is 65435702.

It is not an unprimeable number, because it can be changed into a prime (20753459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648530 + ... + 648561.

Almost surely, 2^20753456 is an apocalyptic number.

It is an amenable number.

20753456 is a deficient number, since it is larger than the sum of its proper divisors (19456396).

20753456 is a wasteful number, since it uses less digits than its factorization.

20753456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297099 (or 1297093 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 20753456 is about 4555.5961190606. The cubic root of 20753456 is about 274.8084881484.

The spelling of 20753456 in words is "twenty million, seven hundred fifty-three thousand, four hundred fifty-six".