20066157 has 16 divisors (see below), whose sum is σ = 29846080. Its totient is φ = 13324176.

The previous prime is 20066153. The next prime is 20066159. The reversal of 20066157 is 75166002.

It is not a de Polignac number, because 20066157 - 2² = 20066153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20066157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066153) 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, 6138 + ... + 8820.

It is an arithmetic number, because the mean of its divisors is an integer number (1865380).

Almost surely, 2^20066157 is an apocalyptic number.

20066157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20066157 is a deficient number, since it is larger than the sum of its proper divisors (9779923).

20066157 is a wasteful number, since it uses less digits than its factorization.

20066157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20066157 is about 4479.5264258624. The cubic root of 20066157 is about 271.7407284661.

The spelling of 20066157 in words is "twenty million, sixty-six thousand, one hundred fifty-seven".