20150555633 has 12 divisors (see below), whose sum is σ = 21842344908. Its totient is φ = 18581322240.

The previous prime is 20150555627. The next prime is 20150555641. The reversal of 20150555633 is 33655505102.

It can be written as a sum of positive squares in 6 ways, for example, as 1449172624 + 18701383009 = 38068^2 + 136753^2 .

It is not a de Polignac number, because 20150555633 - 2³⁰ = 19076813809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20150555593 and 20150555602.

It is not an unprimeable number, because it can be changed into a prime (20150555603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104093 + ... + 226133.

It is an arithmetic number, because the mean of its divisors is an integer number (1820195409).

Almost surely, 2^20150555633 is an apocalyptic number.

It is an amenable number.

20150555633 is a deficient number, since it is larger than the sum of its proper divisors (1691789275).

20150555633 is a wasteful number, since it uses less digits than its factorization.

20150555633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123044 (or 123031 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 35.

The spelling of 20150555633 in words is "twenty billion, one hundred fifty million, five hundred fifty-five thousand, six hundred thirty-three".