20551576051 has 4 divisors (see below), whose sum is σ = 20755057104. Its totient is φ = 20348095000.

The previous prime is 20551576033. The next prime is 20551576069. The reversal of 20551576051 is 15067515502.

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

It is an interprime number because it is at equal distance from previous prime (20551576033) and next prime (20551576069).

It is a cyclic number.

It is not a de Polignac number, because 20551576051 - 2⁷ = 20551575923 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 20551576051.

It is not an unprimeable number, because it can be changed into a prime (20551576091) 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, 101740375 + ... + 101740576.

It is an arithmetic number, because the mean of its divisors is an integer number (5188764276).

Almost surely, 2^20551576051 is an apocalyptic number.

20551576051 is a deficient number, since it is larger than the sum of its proper divisors (203481053).

20551576051 is a wasteful number, since it uses less digits than its factorization.

20551576051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203481052.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 20551576051 in words is "twenty billion, five hundred fifty-one million, five hundred seventy-six thousand, fifty-one".