20430120142 has 4 divisors (see below), whose sum is σ = 30645180216. Its totient is φ = 10215060070.

The previous prime is 20430120097. The next prime is 20430120149. The reversal of 20430120142 is 24102103402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430120149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5107530034 + ... + 5107530037.

It is an arithmetic number, because the mean of its divisors is an integer number (7661295054).

Almost surely, 2^20430120142 is an apocalyptic number.

20430120142 is a deficient number, since it is larger than the sum of its proper divisors (10215060074).

20430120142 is a wasteful number, since it uses less digits than its factorization.

20430120142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215060073.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20430120142 its reverse (24102103402), we get a palindrome (44532223544).

The spelling of 20430120142 in words is "twenty billion, four hundred thirty million, one hundred twenty thousand, one hundred forty-two".