20153206215 has 96 divisors (see below), whose sum is σ = 37393102656. Its totient is φ = 10406154240.

The previous prime is 20153206163. The next prime is 20153206219. The reversal of 20153206215 is 51260235102.

It is a happy number.

20153206215 is a `hidden beast` number, since 2 + 0 + 1 + 5 + 32 + 0 + 621 + 5 = 666.

It is not a de Polignac number, because 20153206215 - 2²¹ = 20151109063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153206219) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 6823179 + ... + 6826131.

It is an arithmetic number, because the mean of its divisors is an integer number (389511486).

Almost surely, 2^20153206215 is an apocalyptic number.

20153206215 is a deficient number, since it is larger than the sum of its proper divisors (17239896441).

20153206215 is a wasteful number, since it uses less digits than its factorization.

20153206215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20153206215 in words is "twenty billion, one hundred fifty-three million, two hundred six thousand, two hundred fifteen".