20340626923 has 4 divisors (see below), whose sum is σ = 20343674520. Its totient is φ = 20337579328.

The previous prime is 20340626899. The next prime is 20340626963. The reversal of 20340626923 is 32962604302.

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

It is a cyclic number.

It is not a de Polignac number, because 20340626923 - 2¹³ = 20340618731 is a prime.

It is a super-2 number, since 2×20340626923² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340626963) 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, 1513765 + ... + 1527142.

It is an arithmetic number, because the mean of its divisors is an integer number (5085918630).

Almost surely, 2^20340626923 is an apocalyptic number.

20340626923 is a deficient number, since it is larger than the sum of its proper divisors (3047597).

20340626923 is an equidigital number, since it uses as much as digits as its factorization.

20340626923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047596.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 20340626923 in words is "twenty billion, three hundred forty million, six hundred twenty-six thousand, nine hundred twenty-three".