20342122042 has 16 divisors (see below), whose sum is σ = 33290718912. Its totient is φ = 9245416320.

The previous prime is 20342121979. The next prime is 20342122043. The reversal of 20342122042 is 24022124302.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20342122043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181003 + ... + 271009.

It is an arithmetic number, because the mean of its divisors is an integer number (2080669932).

Almost surely, 2^20342122042 is an apocalyptic number.

20342122042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20342122042 is a deficient number, since it is larger than the sum of its proper divisors (12948596870).

20342122042 is a wasteful number, since it uses less digits than its factorization.

20342122042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100293.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20342122042 its reverse (24022124302), we get a palindrome (44364246344).

The spelling of 20342122042 in words is "twenty billion, three hundred forty-two million, one hundred twenty-two thousand, forty-two".