20157270 has 32 divisors (see below), whose sum is σ = 55289088. Its totient is φ = 4607328.

The previous prime is 20157259. The next prime is 20157283. The reversal of 20157270 is 7275102.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20157270.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47784 + ... + 48203.

It is an arithmetic number, because the mean of its divisors is an integer number (1727784).

Almost surely, 2^20157270 is an apocalyptic number.

20157270 is an abundant number, since it is smaller than the sum of its proper divisors (35131818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20157270 is a wasteful number, since it uses less digits than its factorization.

20157270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96004.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 20157270 is about 4489.6848441734. The cubic root of 20157270 is about 272.1513989172.

The spelling of 20157270 in words is "twenty million, one hundred fifty-seven thousand, two hundred seventy".