20902087782240 has 96 divisors (see below), whose sum is σ = 75247516028160. Its totient is φ = 4777620063744.

The previous prime is 20902087782203. The next prime is 20902087782241. The reversal of 20902087782240 is 4228778020902.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902087782241) 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, 3110426370 + ... + 3110433089.

It is an arithmetic number, because the mean of its divisors is an integer number (783828291960).

Almost surely, 2^{20902087782240} is an apocalyptic number.

20902087782240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20902087782240 is an abundant number, since it is smaller than the sum of its proper divisors (54345428245920).

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

20902087782240 is a wasteful number, since it uses less digits than its factorization.

20902087782240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220859484 (or 6220859476 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The spelling of 20902087782240 in words is "twenty trillion, nine hundred two billion, eighty-seven million, seven hundred eighty-two thousand, two hundred forty".