20155432110 has 32 divisors (see below), whose sum is σ = 52770586752. Its totient is φ = 4886165280.

The previous prime is 20155432109. The next prime is 20155432111. The reversal of 20155432110 is 1123455102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20155432109) and next prime (20155432111).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155432111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30538204 + ... + 30538863.

It is an arithmetic number, because the mean of its divisors is an integer number (1649080836).

Almost surely, 2^20155432110 is an apocalyptic number.

20155432110 is an abundant number, since it is smaller than the sum of its proper divisors (32615154642).

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

20155432110 is a wasteful number, since it uses less digits than its factorization.

20155432110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61077088.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 20155432110 its reverse (1123455102), we get a palindrome (21278887212).

The spelling of 20155432110 in words is "twenty billion, one hundred fifty-five million, four hundred thirty-two thousand, one hundred ten".