20300157 has 6 divisors (see below), whose sum is σ = 29322462. Its totient is φ = 13533432.

The previous prime is 20300143. The next prime is 20300177. The reversal of 20300157 is 75100302.

It can be written as a sum of positive squares in only one way, i.e., 16818201 + 3481956 = 4101^2 + 1866^2 .

It is not a de Polignac number, because 20300157 - 2¹⁵ = 20267389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20300117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1127778 + ... + 1127795.

It is an arithmetic number, because the mean of its divisors is an integer number (4887077).

Almost surely, 2^20300157 is an apocalyptic number.

It is an amenable number.

20300157 is a deficient number, since it is larger than the sum of its proper divisors (9022305).

20300157 is a wasteful number, since it uses less digits than its factorization.

20300157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255579 (or 2255576 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 20300157 is about 4505.5695533417. The cubic root of 20300157 is about 272.7929436704.

Adding to 20300157 its reverse (75100302), we get a palindrome (95400459).

The spelling of 20300157 in words is "twenty million, three hundred thousand, one hundred fifty-seven".