20068456 has 8 divisors (see below), whose sum is σ = 37628370. Its totient is φ = 10034224.

The previous prime is 20068453. The next prime is 20068457. The reversal of 20068456 is 65486002.

It can be written as a sum of positive squares in only one way, i.e., 19624900 + 443556 = 4430^2 + 666^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20068453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1254271 + ... + 1254286.

Almost surely, 2^20068456 is an apocalyptic number.

It is an amenable number.

20068456 is a deficient number, since it is larger than the sum of its proper divisors (17559914).

20068456 is a wasteful number, since it uses less digits than its factorization.

20068456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508563 (or 2508559 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20068456 is about 4479.7830304603. The cubic root of 20068456 is about 271.7511059402.

The spelling of 20068456 in words is "twenty million, sixty-eight thousand, four hundred fifty-six".