20480157 has 24 divisors (see below), whose sum is σ = 31335200. Its totient is φ = 12853728.

The previous prime is 20480137. The next prime is 20480209. The reversal of 20480157 is 75108402.

It is not a de Polignac number, because 20480157 - 2⁷ = 20480029 is a prime.

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 20480157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20480107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38898 + ... + 39420.

Almost surely, 2^20480157 is an apocalyptic number.

It is an amenable number.

20480157 is a deficient number, since it is larger than the sum of its proper divisors (10855043).

20480157 is a wasteful number, since it uses less digits than its factorization.

20480157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20480157 is about 4525.5007457739. The cubic root of 20480157 is about 273.5968505973.

Adding to 20480157 its reverse (75108402), we get a palindrome (95588559).

The spelling of 20480157 in words is "twenty million, four hundred eighty thousand, one hundred fifty-seven".