20352535771440 has 80 divisors (see below), whose sum is σ = 63107574472800. Its totient is φ = 5426077188096.

The previous prime is 20352535771429. The next prime is 20352535771457. The reversal of 20352535771440 is 4417753525302.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 20352535771440.

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, 8856655 + ... + 10915374.

It is an arithmetic number, because the mean of its divisors is an integer number (788844680910).

Almost surely, 2^{20352535771440} is an apocalyptic number.

20352535771440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20352535771440 is an abundant number, since it is smaller than the sum of its proper divisors (42755038701360).

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

20352535771440 is a wasteful number, since it uses less digits than its factorization.

20352535771440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19776334 (or 19776328 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 48.

The spelling of 20352535771440 in words is "twenty trillion, three hundred fifty-two billion, five hundred thirty-five million, seven hundred seventy-one thousand, four hundred forty".