20145024742 has 12 divisors (see below), whose sum is σ = 30295834380. Its totient is φ = 10046423508.

The previous prime is 20145024719. The next prime is 20145024751. The reversal of 20145024742 is 24742054102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4106263 + ... + 4111165.

It is an arithmetic number, because the mean of its divisors is an integer number (2524652865).

Almost surely, 2^20145024742 is an apocalyptic number.

20145024742 is a deficient number, since it is larger than the sum of its proper divisors (10150809638).

20145024742 is an frugal number, since it uses more digits than its factorization.

20145024742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10227 (or 5324 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 31.

Adding to 20145024742 its reverse (24742054102), we get a palindrome (44887078844).

The spelling of 20145024742 in words is "twenty billion, one hundred forty-five million, twenty-four thousand, seven hundred forty-two".