20545111032540 has 48 divisors (see below), whose sum is σ = 57582654168480. Its totient is φ = 5473330248960.

The previous prime is 20545111032533. The next prime is 20545111032599. The reversal of 20545111032540 is 4523011154502.

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, 167626555 + ... + 167749074.

It is an arithmetic number, because the mean of its divisors is an integer number (1199638628510).

Almost surely, 2^{20545111032540} is an apocalyptic number.

20545111032540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20545111032540 is an abundant number, since it is smaller than the sum of its proper divisors (37037543135940).

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

20545111032540 is a wasteful number, since it uses less digits than its factorization.

20545111032540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335376662 (or 335376660 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 20545111032540 in words is "twenty trillion, five hundred forty-five billion, one hundred eleven million, thirty-two thousand, five hundred forty".