20942194193 has 4 divisors (see below), whose sum is σ = 22044414960. Its totient is φ = 19839973428.

The previous prime is 20942194177. The next prime is 20942194201. The reversal of 20942194193 is 39149124902.

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 20942194193 - 2⁴ = 20942194177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20942194103) 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, 551110355 + ... + 551110392.

It is an arithmetic number, because the mean of its divisors is an integer number (5511103740).

Almost surely, 2^20942194193 is an apocalyptic number.

It is an amenable number.

20942194193 is a deficient number, since it is larger than the sum of its proper divisors (1102220767).

20942194193 is a wasteful number, since it uses less digits than its factorization.

20942194193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102220766.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 20942194193 in words is "twenty billion, nine hundred forty-two million, one hundred ninety-four thousand, one hundred ninety-three".