20442140102 has 4 divisors (see below), whose sum is σ = 30663210156. Its totient is φ = 10221070050.

The previous prime is 20442140099. The next prime is 20442140137. The reversal of 20442140102 is 20104124402.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110535024 + ... + 5110535027.

It is an arithmetic number, because the mean of its divisors is an integer number (7665802539).

Almost surely, 2^20442140102 is an apocalyptic number.

20442140102 is a deficient number, since it is larger than the sum of its proper divisors (10221070054).

20442140102 is a wasteful number, since it uses less digits than its factorization.

20442140102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221070053.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20442140102 its reverse (20104124402), we get a palindrome (40546264504).

The spelling of 20442140102 in words is "twenty billion, four hundred forty-two million, one hundred forty thousand, one hundred two".