20340016451 has 4 divisors (see below), whose sum is σ = 20464801992. Its totient is φ = 20215230912.

The previous prime is 20340016441. The next prime is 20340016471. The reversal of 20340016451 is 15461004302.

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 20340016451 - 2⁶ = 20340016387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20340016451.

It is not an unprimeable number, because it can be changed into a prime (20340016421) 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, 62392526 + ... + 62392851.

It is an arithmetic number, because the mean of its divisors is an integer number (5116200498).

Almost surely, 2^20340016451 is an apocalyptic number.

20340016451 is a deficient number, since it is larger than the sum of its proper divisors (124785541).

20340016451 is a wasteful number, since it uses less digits than its factorization.

20340016451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124785540.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20340016451 in words is "twenty billion, three hundred forty million, sixteen thousand, four hundred fifty-one".