20151553233 has 8 divisors (see below), whose sum is σ = 30707128768. Its totient is φ = 11515173264.

The previous prime is 20151553189. The next prime is 20151553307. The reversal of 20151553233 is 33235515102.

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

It is not a de Polignac number, because 20151553233 - 2²¹ = 20149456081 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 20151553233.

It is not an unprimeable number, because it can be changed into a prime (20151553133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479798866 + ... + 479798907.

It is an arithmetic number, because the mean of its divisors is an integer number (3838391096).

Almost surely, 2^20151553233 is an apocalyptic number.

It is an amenable number.

20151553233 is a deficient number, since it is larger than the sum of its proper divisors (10555575535).

20151553233 is an equidigital number, since it uses as much as digits as its factorization.

20151553233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959597783.

The product of its (nonzero) digits is 13500, while the sum is 30.

The spelling of 20151553233 in words is "twenty billion, one hundred fifty-one million, five hundred fifty-three thousand, two hundred thirty-three".