20231021194 has 8 divisors (see below), whose sum is σ = 30356214948. Its totient is φ = 10112282880.

The previous prime is 20231021189. The next prime is 20231021219. The reversal of 20231021194 is 49112013202.

It can be written as a sum of positive squares in 2 ways, for example, as 11932722169 + 8298299025 = 109237^2 + 91095^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1606017 + ... + 1618564.

Almost surely, 2^20231021194 is an apocalyptic number.

20231021194 is a deficient number, since it is larger than the sum of its proper divisors (10125193754).

20231021194 is a wasteful number, since it uses less digits than its factorization.

20231021194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227720.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 20231021194 its reverse (49112013202), we get a palindrome (69343034396).

The spelling of 20231021194 in words is "twenty billion, two hundred thirty-one million, twenty-one thousand, one hundred ninety-four".