20452694667 has 4 divisors (see below), whose sum is σ = 27270259560. Its totient is φ = 13635129776.

The previous prime is 20452694663. The next prime is 20452694681. The reversal of 20452694667 is 76649625402.

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 20452694667 - 2² = 20452694663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20452694663) 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, 3408782442 + ... + 3408782447.

It is an arithmetic number, because the mean of its divisors is an integer number (6817564890).

Almost surely, 2^20452694667 is an apocalyptic number.

20452694667 is a deficient number, since it is larger than the sum of its proper divisors (6817564893).

20452694667 is an equidigital number, since it uses as much as digits as its factorization.

20452694667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6817564892.

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 20452694667 in words is "twenty billion, four hundred fifty-two million, six hundred ninety-four thousand, six hundred sixty-seven".