20425422542 has 24 divisors (see below), whose sum is σ = 35665055496. Its totient is φ = 8747666928.

The previous prime is 20425422499. The next prime is 20425422559. The reversal of 20425422542 is 24522452402.

It is a junction number, because it is equal to n+sod(n) for n = 20425422499 and 20425422508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70673 + ... + 214115.

It is an arithmetic number, because the mean of its divisors is an integer number (1486043979).

Almost surely, 2^20425422542 is an apocalyptic number.

20425422542 is a deficient number, since it is larger than the sum of its proper divisors (15239632954).

20425422542 is a wasteful number, since it uses less digits than its factorization.

20425422542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144912 (or 144905 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 32.

Adding to 20425422542 its reverse (24522452402), we get a palindrome (44947874944).

The spelling of 20425422542 in words is "twenty billion, four hundred twenty-five million, four hundred twenty-two thousand, five hundred forty-two".