20343922451 has 4 divisors (see below), whose sum is σ = 20390264400. Its totient is φ = 20297580504.

The previous prime is 20343922447. The next prime is 20343922477. The reversal of 20343922451 is 15422934302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15422934302 = 2 ⋅7711467151.

It is a cyclic number.

It is not a de Polignac number, because 20343922451 - 2² = 20343922447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20343922481) 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, 23170316 + ... + 23171193.

It is an arithmetic number, because the mean of its divisors is an integer number (5097566100).

Almost surely, 2^20343922451 is an apocalyptic number.

20343922451 is a deficient number, since it is larger than the sum of its proper divisors (46341949).

20343922451 is an equidigital number, since it uses as much as digits as its factorization.

20343922451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46341948.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 20343922451 in words is "twenty billion, three hundred forty-three million, nine hundred twenty-two thousand, four hundred fifty-one".