20067615451 has 4 divisors (see below), whose sum is σ = 21611278192. Its totient is φ = 18523952712.

The previous prime is 20067615443. The next prime is 20067615479. The reversal of 20067615451 is 15451676002.

It is a happy number.

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 20067615451 - 2³ = 20067615443 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 20067615451.

It is not an unprimeable number, because it can be changed into a prime (20067613451) 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, 771831351 + ... + 771831376.

It is an arithmetic number, because the mean of its divisors is an integer number (5402819548).

Almost surely, 2^20067615451 is an apocalyptic number.

20067615451 is a deficient number, since it is larger than the sum of its proper divisors (1543662741).

20067615451 is a wasteful number, since it uses less digits than its factorization.

20067615451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543662740.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 20067615451 in words is "twenty billion, sixty-seven million, six hundred fifteen thousand, four hundred fifty-one".