20120201409 has 16 divisors (see below), whose sum is σ = 33446568960. Its totient is φ = 10452052560.

The previous prime is 20120201407. The next prime is 20120201419. The reversal of 20120201409 is 90410202102.

It is not a de Polignac number, because 20120201409 - 2¹ = 20120201407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20120201407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43549989 + ... + 43550450.

It is an arithmetic number, because the mean of its divisors is an integer number (2090410560).

Almost surely, 2^20120201409 is an apocalyptic number.

It is an amenable number.

20120201409 is a deficient number, since it is larger than the sum of its proper divisors (13326367551).

20120201409 is a wasteful number, since it uses less digits than its factorization.

20120201409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87100460.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 20120201409 in words is "twenty billion, one hundred twenty million, two hundred one thousand, four hundred nine".