20267397 has 12 divisors (see below), whose sum is σ = 30219904. Its totient is φ = 13075560.

The previous prime is 20267389. The next prime is 20267399. The reversal of 20267397 is 79376202.

20267397 is a `hidden beast` number, since 2 + 0 + 267 + 397 = 666.

It is not a de Polignac number, because 20267397 - 2³ = 20267389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20267399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36043 + ... + 36600.

Almost surely, 2^20267397 is an apocalyptic number.

It is an amenable number.

20267397 is a deficient number, since it is larger than the sum of its proper divisors (9952507).

20267397 is a wasteful number, since it uses less digits than its factorization.

20267397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72680 (or 72677 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 20267397 is about 4501.9325850128. The cubic root of 20267397 is about 272.6461220073.

The spelling of 20267397 in words is "twenty million, two hundred sixty-seven thousand, three hundred ninety-seven".