20155121507000 has 64 divisors (see below), whose sum is σ = 47164938387840. Its totient is φ = 8061714576000.

The previous prime is 20155121506981. The next prime is 20155121507051. The reversal of 20155121507000 is 70512155102.

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, 24471905 + ... + 25282095.

It is an arithmetic number, because the mean of its divisors is an integer number (736952162310).

Almost surely, 2^{20155121507000} is an apocalyptic number.

20155121507000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20155121507000 is an abundant number, since it is smaller than the sum of its proper divisors (27009816880840).

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

20155121507000 is a wasteful number, since it uses less digits than its factorization.

20155121507000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835089 (or 835075 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 29.

The spelling of 20155121507000 in words is "twenty trillion, one hundred fifty-five billion, one hundred twenty-one million, five hundred seven thousand".