20387097 has 24 divisors (see below), whose sum is σ = 31370976. Its totient is φ = 12713856.

The previous prime is 20387089. The next prime is 20387113. The reversal of 20387097 is 79078302.

It is not a de Polignac number, because 20387097 - 2³ = 20387089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20387027) 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, 34438 + ... + 35024.

It is an arithmetic number, because the mean of its divisors is an integer number (1307124).

Almost surely, 2^20387097 is an apocalyptic number.

It is an amenable number.

20387097 is a deficient number, since it is larger than the sum of its proper divisors (10983879).

20387097 is a wasteful number, since it uses less digits than its factorization.

20387097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20387097 is about 4515.2073042110. The cubic root of 20387097 is about 273.1818214772.

The spelling of 20387097 in words is "twenty million, three hundred eighty-seven thousand, ninety-seven".