20402143000146 has 144 divisors (see below), whose sum is σ = 46810867783680. Its totient is φ = 6418043683200.

The previous prime is 20402143000123. The next prime is 20402143000163. The reversal of 20402143000146 is 64100034120402.

It is a happy number.

20402143000146 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 214 + 300 + 0 + 146 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2183677551 + ... + 2183686893.

It is an arithmetic number, because the mean of its divisors is an integer number (325075470720).

Almost surely, 2^{20402143000146} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20402143000146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23405433891840).

20402143000146 is an abundant number, since it is smaller than the sum of its proper divisors (26408724783534).

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

20402143000146 is a wasteful number, since it uses less digits than its factorization.

20402143000146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12533 (or 12499 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20402143000146 its reverse (64100034120402), we get a palindrome (84502177120548).

The spelling of 20402143000146 in words is "twenty trillion, four hundred two billion, one hundred forty-three million, one hundred forty-six", and thus it is an aban number.