20901896 has 16 divisors (see below), whose sum is σ = 39266640. Its totient is φ = 10430800.

The previous prime is 20901889. The next prime is 20901901. The reversal of 20901896 is 69810902.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2471 + ... + 6921.

It is an arithmetic number, because the mean of its divisors is an integer number (2454165).

Almost surely, 2^20901896 is an apocalyptic number.

It is an amenable number.

20901896 is a deficient number, since it is larger than the sum of its proper divisors (18364744).

20901896 is a wasteful number, since it uses less digits than its factorization.

20901896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044 (or 5040 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 20901896 is about 4571.8591404373. The cubic root of 20901896 is about 275.4621254627.

The spelling of 20901896 in words is "twenty million, nine hundred one thousand, eight hundred ninety-six".