20155655102 has 32 divisors (see below), whose sum is σ = 33283208448. Its totient is φ = 9153771000.

The previous prime is 20155655057. The next prime is 20155655111.

20155655102 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4019777 + ... + 4024787.

It is an arithmetic number, because the mean of its divisors is an integer number (1040100264).

Almost surely, 2^20155655102 is an apocalyptic number.

20155655102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20155655102 is a deficient number, since it is larger than the sum of its proper divisors (13127553346).

20155655102 is a wasteful number, since it uses less digits than its factorization.

20155655102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557 (or 6535 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 20155655102 in words is "twenty billion, one hundred fifty-five million, six hundred fifty-five thousand, one hundred two".