20422525462542 has 160 divisors (see below), whose sum is σ = 52375018493952. Its totient is φ = 5826526909056.

The previous prime is 20422525462523. The next prime is 20422525462567. The reversal of 20422525462542 is 24526452522402.

20422525462542 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 2 + 52 + 54 + 6 + 2 + 542 = 666.

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 79 ways as a sum of consecutive naturals, for example, 4131602923 + ... + 4131607865.

Almost surely, 2^{20422525462542} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20422525462542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26187509246976).

20422525462542 is an abundant number, since it is smaller than the sum of its proper divisors (31952493031410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20422525462542 is a wasteful number, since it uses less digits than its factorization.

20422525462542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9524 (or 9515 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 45.

Adding to 20422525462542 its reverse (24526452522402), we get a palindrome (44948977984944).

The spelling of 20422525462542 in words is "twenty trillion, four hundred twenty-two billion, five hundred twenty-five million, four hundred sixty-two thousand, five hundred forty-two".