20925149 has 8 divisors (see below), whose sum is σ = 23956800. Its totient is φ = 17904096.

The previous prime is 20925139. The next prime is 20925169. The reversal of 20925149 is 94152902.

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

It is a de Polignac number, because none of the positive numbers 2^k-20925149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20925119) 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, 2177 + ... + 6825.

It is an arithmetic number, because the mean of its divisors is an integer number (2994600).

Almost surely, 2^20925149 is an apocalyptic number.

It is an amenable number.

20925149 is a deficient number, since it is larger than the sum of its proper divisors (3031651).

20925149 is an equidigital number, since it uses as much as digits as its factorization.

20925149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5299.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 20925149 is about 4574.4014909057. The cubic root of 20925149 is about 275.5642365663.

The spelling of 20925149 in words is "twenty million, nine hundred twenty-five thousand, one hundred forty-nine".