20615120670 has 32 divisors (see below), whose sum is σ = 51182370720. Its totient is φ = 5307800960.

The previous prime is 20615120627. The next prime is 20615120671. The reversal of 20615120670 is 7602151602.

It is a super-3 number, since 3×20615120670³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20615120671) 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 15 ways as a sum of consecutive naturals, for example, 11846901 + ... + 11848640.

It is an arithmetic number, because the mean of its divisors is an integer number (1599449085).

Almost surely, 2^20615120670 is an apocalyptic number.

20615120670 is an abundant number, since it is smaller than the sum of its proper divisors (30567250050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20615120670 is a wasteful number, since it uses less digits than its factorization.

20615120670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23695580.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 20615120670 in words is "twenty billion, six hundred fifteen million, one hundred twenty thousand, six hundred seventy".