21442060057 has 8 divisors (see below), whose sum is σ = 23415145920. Its totient is φ = 19472942160.

The previous prime is 21442060051. The next prime is 21442060091. The reversal of 21442060057 is 75006024412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21442060057 - 2²⁷ = 21307842329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442060051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980682 + ... + 1002307.

It is an arithmetic number, because the mean of its divisors is an integer number (2926893240).

Almost surely, 2^21442060057 is an apocalyptic number.

It is an amenable number.

21442060057 is a deficient number, since it is larger than the sum of its proper divisors (1973085863).

21442060057 is a wasteful number, since it uses less digits than its factorization.

21442060057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983983.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 21442060057 its reverse (75006024412), we get a palindrome (96448084469).

The spelling of 21442060057 in words is "twenty-one billion, four hundred forty-two million, sixty thousand, fifty-seven".