20272891 has 8 divisors (see below), whose sum is σ = 21512304. Its totient is φ = 19038720.

The previous prime is 20272859. The next prime is 20272897. The reversal of 20272891 is 19827202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20272891 - 2⁵ = 20272859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20272897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9076 + ... + 11086.

It is an arithmetic number, because the mean of its divisors is an integer number (2689038).

Almost surely, 2^20272891 is an apocalyptic number.

20272891 is a deficient number, since it is larger than the sum of its proper divisors (1239413).

20272891 is a wasteful number, since it uses less digits than its factorization.

20272891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20272891 is about 4502.5427260605. The cubic root of 20272891 is about 272.6707556996.

The spelling of 20272891 in words is "twenty million, two hundred seventy-two thousand, eight hundred ninety-one".