20601890142 has 32 divisors (see below), whose sum is σ = 43025748480. Its totient is φ = 6564059040.

The previous prime is 20601890107. The next prime is 20601890167. The reversal of 20601890142 is 24109810602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144967 + ... + 249437.

It is an arithmetic number, because the mean of its divisors is an integer number (1344554640).

Almost surely, 2^20601890142 is an apocalyptic number.

20601890142 is an abundant number, since it is smaller than the sum of its proper divisors (22423858338).

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

20601890142 is a wasteful number, since it uses less digits than its factorization.

20601890142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105928.

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 20601890142 in words is "twenty billion, six hundred one million, eight hundred ninety thousand, one hundred forty-two".