20157206 has 16 divisors (see below), whose sum is σ = 32542560. Its totient is φ = 9329280.

The previous prime is 20157187. The next prime is 20157209. The reversal of 20157206 is 60275102.

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 7 ways as a sum of consecutive naturals, for example, 2786 + ... + 6933.

It is an arithmetic number, because the mean of its divisors is an integer number (2033910).

Almost surely, 2^20157206 is an apocalyptic number.

20157206 is a deficient number, since it is larger than the sum of its proper divisors (12385354).

20157206 is a wasteful number, since it uses less digits than its factorization.

20157206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9799.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20157206 is about 4489.6777167187. The cubic root of 20157206 is about 272.1511108870.

The spelling of 20157206 in words is "twenty million, one hundred fifty-seven thousand, two hundred six".