21622598542 has 4 divisors (see below), whose sum is σ = 32433897816. Its totient is φ = 10811299270.

The previous prime is 21622598533. The next prime is 21622598581. The reversal of 21622598542 is 24589522612.

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

It is a junction number, because it is equal to n+sod(n) for n = 21622598492 and 21622598501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5405649634 + ... + 5405649637.

It is an arithmetic number, because the mean of its divisors is an integer number (8108474454).

Almost surely, 2^21622598542 is an apocalyptic number.

21622598542 is a deficient number, since it is larger than the sum of its proper divisors (10811299274).

21622598542 is a wasteful number, since it uses less digits than its factorization.

21622598542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10811299273.

The product of its digits is 691200, while the sum is 46.

The spelling of 21622598542 in words is "twenty-one billion, six hundred twenty-two million, five hundred ninety-eight thousand, five hundred forty-two".