20290939393 has 8 divisors (see below), whose sum is σ = 20741781600. Its totient is φ = 19843661568.

The previous prime is 20290939369. The next prime is 20290939399. The reversal of 20290939393 is 39393909202.

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

It is a cyclic number.

It is not a de Polignac number, because 20290939393 - 2⁹ = 20290938881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20290939399) 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, 879583 + ... + 902356.

It is an arithmetic number, because the mean of its divisors is an integer number (2592722700).

Almost surely, 2^20290939393 is an apocalyptic number.

It is an amenable number.

20290939393 is a deficient number, since it is larger than the sum of its proper divisors (450842207).

20290939393 is a wasteful number, since it uses less digits than its factorization.

20290939393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782191.

The product of its (nonzero) digits is 708588, while the sum is 49.

The spelling of 20290939393 in words is "twenty billion, two hundred ninety million, nine hundred thirty-nine thousand, three hundred ninety-three".