20072409 has 12 divisors (see below), whose sum is σ = 31132944. Its totient is φ = 11469864.

The previous prime is 20072383. The next prime is 20072447. The reversal of 20072409 is 90427002.

It is not a de Polignac number, because 20072409 - 2¹³ = 20064217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20072489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68127 + ... + 68420.

It is an arithmetic number, because the mean of its divisors is an integer number (2594412).

Almost surely, 2^20072409 is an apocalyptic number.

It is an amenable number.

20072409 is a deficient number, since it is larger than the sum of its proper divisors (11060535).

20072409 is a wasteful number, since it uses less digits than its factorization.

20072409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136564 (or 136557 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20072409 is about 4480.2242131393. The cubic root of 20072409 is about 271.7689475652.

The spelling of 20072409 in words is "twenty million, seventy-two thousand, four hundred nine".