21403102022044 has 24 divisors (see below), whose sum is σ = 38478315162560. Its totient is φ = 10409456753856.

The previous prime is 21403102022041. The next prime is 21403102022051. The reversal of 21403102022044 is 44022020130412.

It is a super-2 number, since 2×21403102022044² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403102022041) 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, 19342884 + ... + 20419435.

Almost surely, 2^{21403102022044} is an apocalyptic number.

It is an amenable number.

21403102022044 is a deficient number, since it is larger than the sum of its proper divisors (17075213140516).

21403102022044 is a wasteful number, since it uses less digits than its factorization.

21403102022044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39765997 (or 39765995 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21403102022044 its reverse (44022020130412), we get a palindrome (65425122152456).

The spelling of 21403102022044 in words is "twenty-one trillion, four hundred three billion, one hundred two million, twenty-two thousand, forty-four".