20121413329 has 4 divisors (see below), whose sum is σ = 20135320384. Its totient is φ = 20107506276.

The previous prime is 20121413287. The next prime is 20121413353. The reversal of 20121413329 is 92331412102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20121413329 - 2²⁷ = 19987195601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121413297 and 20121413306.

It is not an unprimeable number, because it can be changed into a prime (20121413729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6951357 + ... + 6954250.

It is an arithmetic number, because the mean of its divisors is an integer number (5033830096).

Almost surely, 2^20121413329 is an apocalyptic number.

It is an amenable number.

20121413329 is a deficient number, since it is larger than the sum of its proper divisors (13907055).

20121413329 is a wasteful number, since it uses less digits than its factorization.

20121413329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13907054.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 20121413329 in words is "twenty billion, one hundred twenty-one million, four hundred thirteen thousand, three hundred twenty-nine".