20153629557 has 12 divisors (see below), whose sum is σ = 30823198380. Its totient is φ = 12645414528.

The previous prime is 20153629553. The next prime is 20153629571. The reversal of 20153629557 is 75592635102.

20153629557 is a `hidden beast` number, since 2 + 0 + 15 + 3 + 629 + 5 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14455493361 + 5698136196 = 120231^2 + 75486^2 .

It is not a de Polignac number, because 20153629557 - 2² = 20153629553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153629553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65861382 + ... + 65861687.

It is an arithmetic number, because the mean of its divisors is an integer number (2568599865).

Almost surely, 2^20153629557 is an apocalyptic number.

It is an amenable number.

20153629557 is a deficient number, since it is larger than the sum of its proper divisors (10669568823).

20153629557 is a wasteful number, since it uses less digits than its factorization.

20153629557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131723092 (or 131723089 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The spelling of 20153629557 in words is "twenty billion, one hundred fifty-three million, six hundred twenty-nine thousand, five hundred fifty-seven".