20343664214651 has 4 divisors (see below), whose sum is σ = 20351664085152. Its totient is φ = 20335664344152.

The previous prime is 20343664214647. The next prime is 20343664214677. The reversal of 20343664214651 is 15641246634302.

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 20343664214651 - 2² = 20343664214647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20343664214596 and 20343664214605.

It is not an unprimeable number, because it can be changed into a prime (20343664214681) 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, 3999931436 + ... + 3999936521.

It is an arithmetic number, because the mean of its divisors is an integer number (5087916021288).

Almost surely, 2^{20343664214651} is an apocalyptic number.

20343664214651 is a deficient number, since it is larger than the sum of its proper divisors (7999870501).

20343664214651 is an equidigital number, since it uses as much as digits as its factorization.

20343664214651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999870500.

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 20343664214651 in words is "twenty trillion, three hundred forty-three billion, six hundred sixty-four million, two hundred fourteen thousand, six hundred fifty-one".