20133968 has 10 divisors (see below), whose sum is σ = 39009594. Its totient is φ = 10066976.

The previous prime is 20133961. The next prime is 20133983. The reversal of 20133968 is 86933102.

It can be written as a sum of positive squares in only one way, i.e., 14807104 + 5326864 = 3848^2 + 2308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629171 + ... + 629202.

Almost surely, 2^20133968 is an apocalyptic number.

It is an amenable number.

20133968 is a deficient number, since it is larger than the sum of its proper divisors (18875626).

20133968 is a wasteful number, since it uses less digits than its factorization.

20133968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258381 (or 1258375 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20133968 is about 4487.0890341066. The cubic root of 20133968 is about 272.0464885938.

The spelling of 20133968 in words is "twenty million, one hundred thirty-three thousand, nine hundred sixty-eight".