11420897939 has 4 divisors (see below), whose sum is σ = 12459161400. Its totient is φ = 10382634480.

The previous prime is 11420897933. The next prime is 11420897981. The reversal of 11420897939 is 93979802411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11420897939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11420897933) 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, 519131714 + ... + 519131735.

It is an arithmetic number, because the mean of its divisors is an integer number (3114790350).

Almost surely, 2^11420897939 is an apocalyptic number.

11420897939 is a deficient number, since it is larger than the sum of its proper divisors (1038263461).

11420897939 is a wasteful number, since it uses less digits than its factorization.

11420897939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038263460.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 11420897939 in words is "eleven billion, four hundred twenty million, eight hundred ninety-seven thousand, nine hundred thirty-nine".