20236552051 has 4 divisors (see below), whose sum is σ = 20370569104. Its totient is φ = 20102535000.

The previous prime is 20236552009. The next prime is 20236552087. The reversal of 20236552051 is 15025563202.

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 20236552051 - 2⁹ = 20236551539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20236552351) 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, 67008300 + ... + 67008601.

It is an arithmetic number, because the mean of its divisors is an integer number (5092642276).

Almost surely, 2^20236552051 is an apocalyptic number.

20236552051 is a deficient number, since it is larger than the sum of its proper divisors (134017053).

20236552051 is a wasteful number, since it uses less digits than its factorization.

20236552051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134017052.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 20236552051 in words is "twenty billion, two hundred thirty-six million, five hundred fifty-two thousand, fifty-one".