20117597270 has 64 divisors (see below), whose sum is σ = 37506309120. Its totient is φ = 7766074368.

The previous prime is 20117597267. The next prime is 20117597273. The reversal of 20117597270 is 7279571102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20117597267) and next prime (20117597273).

It is a super-2 number, since 2×20117597270² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117597273) 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 31 ways as a sum of consecutive naturals, for example, 6358709 + ... + 6361871.

It is an arithmetic number, because the mean of its divisors is an integer number (586036080).

Almost surely, 2^20117597270 is an apocalyptic number.

20117597270 is a deficient number, since it is larger than the sum of its proper divisors (17388711850).

20117597270 is a wasteful number, since it uses less digits than its factorization.

20117597270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429.

The product of its (nonzero) digits is 61740, while the sum is 41.

The spelling of 20117597270 in words is "twenty billion, one hundred seventeen million, five hundred ninety-seven thousand, two hundred seventy".