20251145633 has 8 divisors (see below), whose sum is σ = 20756698752. Its totient is φ = 19748704176.

The previous prime is 20251145623. The next prime is 20251145659. The reversal of 20251145633 is 33654115202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20251145633 - 2⁴ = 20251145617 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 20251145633.

It is not an unprimeable number, because it can be changed into a prime (20251145623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764735 + ... + 790772.

It is an arithmetic number, because the mean of its divisors is an integer number (2594587344).

Almost surely, 2^20251145633 is an apocalyptic number.

It is an amenable number.

20251145633 is a deficient number, since it is larger than the sum of its proper divisors (505553119).

20251145633 is a wasteful number, since it uses less digits than its factorization.

20251145633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555831.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20251145633 in words is "twenty billion, two hundred fifty-one million, one hundred forty-five thousand, six hundred thirty-three".