20554255451 has 4 divisors (see below), whose sum is σ = 20572657872. Its totient is φ = 20535853032.

The previous prime is 20554255411. The next prime is 20554255483. The reversal of 20554255451 is 15455245502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20554255451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20554255411) 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, 9199535 + ... + 9201768.

It is an arithmetic number, because the mean of its divisors is an integer number (5143164468).

Almost surely, 2^20554255451 is an apocalyptic number.

20554255451 is a deficient number, since it is larger than the sum of its proper divisors (18402421).

20554255451 is a wasteful number, since it uses less digits than its factorization.

20554255451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18402420.

The product of its (nonzero) digits is 200000, while the sum is 38.

The spelling of 20554255451 in words is "twenty billion, five hundred fifty-four million, two hundred fifty-five thousand, four hundred fifty-one".