20442021123 has 8 divisors (see below), whose sum is σ = 27301993488. Its totient is φ = 13605031424.

The previous prime is 20442021097. The next prime is 20442021133. The reversal of 20442021123 is 32112024402.

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 20442021123 - 2⁹ = 20442020611 is a prime.

It is a super-2 number, since 2×20442021123² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20442021123.

It is not an unprimeable number, because it can be changed into a prime (20442021133) 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, 5743590 + ... + 5747147.

It is an arithmetic number, because the mean of its divisors is an integer number (3412749186).

Almost surely, 2^20442021123 is an apocalyptic number.

20442021123 is a deficient number, since it is larger than the sum of its proper divisors (6859972365).

20442021123 is a wasteful number, since it uses less digits than its factorization.

20442021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11491333.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20442021123 its reverse (32112024402), we get a palindrome (52554045525).

The spelling of 20442021123 in words is "twenty billion, four hundred forty-two million, twenty-one thousand, one hundred twenty-three".