20153513665 has 8 divisors (see below), whose sum is σ = 24410237760. Its totient is φ = 15972130032.

The previous prime is 20153513657. The next prime is 20153513687. The reversal of 20153513665 is 56631535102.

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 20153513665 - 2³ = 20153513657 is a prime.

It is a super-2 number, since 2×20153513665² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18834525 + ... + 18835594.

It is an arithmetic number, because the mean of its divisors is an integer number (3051279720).

Almost surely, 2^20153513665 is an apocalyptic number.

It is an amenable number.

20153513665 is a deficient number, since it is larger than the sum of its proper divisors (4256724095).

20153513665 is a wasteful number, since it uses less digits than its factorization.

20153513665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37670231.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 20153513665 in words is "twenty billion, one hundred fifty-three million, five hundred thirteen thousand, six hundred sixty-five".