20354530143790 has 32 divisors (see below), whose sum is σ = 37189366736544. Its totient is φ = 8019348986880.

The previous prime is 20354530143751. The next prime is 20354530143791. The reversal of 20354530143790 is 9734103545302.

It is a self number, because there is not a number n which added to its sum of digits gives 20354530143790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354530143791) 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, 3926422 + ... + 7491718.

It is an arithmetic number, because the mean of its divisors is an integer number (1162167710517).

Almost surely, 2^{20354530143790} is an apocalyptic number.

20354530143790 is a deficient number, since it is larger than the sum of its proper divisors (16834836592754).

20354530143790 is a wasteful number, since it uses less digits than its factorization.

20354530143790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573892.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 20354530143790 in words is "twenty trillion, three hundred fifty-four billion, five hundred thirty million, one hundred forty-three thousand, seven hundred ninety".