20932151 has 4 divisors (see below), whose sum is σ = 22163472. Its totient is φ = 19700832.

The previous prime is 20932147. The next prime is 20932157. The reversal of 20932151 is 15123902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20932151 - 2² = 20932147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20932157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615635 + ... + 615668.

It is an arithmetic number, because the mean of its divisors is an integer number (5540868).

Almost surely, 2^20932151 is an apocalyptic number.

20932151 is a deficient number, since it is larger than the sum of its proper divisors (1231321).

20932151 is a wasteful number, since it uses less digits than its factorization.

20932151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231320.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20932151 is about 4575.1667729166. The cubic root of 20932151 is about 275.5949696904.

The spelling of 20932151 in words is "twenty million, nine hundred thirty-two thousand, one hundred fifty-one".