20157279 has 16 divisors (see below), whose sum is σ = 27438432. Its totient is φ = 13160448.

The previous prime is 20157259. The next prime is 20157283. The reversal of 20157279 is 97275102.

It is not a de Polignac number, because 20157279 - 2¹⁷ = 20026207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32577 + ... + 33189.

It is an arithmetic number, because the mean of its divisors is an integer number (1714902).

Almost surely, 2^20157279 is an apocalyptic number.

20157279 is a deficient number, since it is larger than the sum of its proper divisors (7281153).

20157279 is a wasteful number, since it uses less digits than its factorization.

20157279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 20157279 is about 4489.6858464708. The cubic root of 20157279 is about 272.1514394214.

The spelling of 20157279 in words is "twenty million, one hundred fifty-seven thousand, two hundred seventy-nine".