20155021072734 has 32 divisors (see below), whose sum is σ = 41707709598240. Its totient is φ = 6485480960000.

The previous prime is 20155021072709. The next prime is 20155021072757. The reversal of 20155021072734 is 43727012055102.

It is a junction number, because it is equal to n+sod(n) for n = 20155021072692 and 20155021072701.

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, 9697767 + ... + 11591234.

It is an arithmetic number, because the mean of its divisors is an integer number (1303365924945).

Almost surely, 2^{20155021072734} is an apocalyptic number.

20155021072734 is an abundant number, since it is smaller than the sum of its proper divisors (21552688525506).

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

20155021072734 is a wasteful number, since it uses less digits than its factorization.

20155021072734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21294476.

The product of its (nonzero) digits is 117600, while the sum is 39.

The spelling of 20155021072734 in words is "twenty trillion, one hundred fifty-five billion, twenty-one million, seventy-two thousand, seven hundred thirty-four".