20930383491 has 8 divisors (see below), whose sum is σ = 28807409664. Its totient is φ = 13503473160.

The previous prime is 20930383471. The next prime is 20930383499. The reversal of 20930383491 is 19438303902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20930383491 - 2⁷ = 20930383363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20930383499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112528851 + ... + 112529036.

It is an arithmetic number, because the mean of its divisors is an integer number (3600926208).

Almost surely, 2^20930383491 is an apocalyptic number.

20930383491 is a deficient number, since it is larger than the sum of its proper divisors (7877026173).

20930383491 is a wasteful number, since it uses less digits than its factorization.

20930383491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225057921.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 20930383491 in words is "twenty billion, nine hundred thirty million, three hundred eighty-three thousand, four hundred ninety-one".