21263012032404 has 24 divisors (see below), whose sum is σ = 49634272866528. Its totient is φ = 7084730945440.

The previous prime is 21263012032351. The next prime is 21263012032453. The reversal of 21263012032404 is 40423021036212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367436367 + ... + 367494230.

It is an arithmetic number, because the mean of its divisors is an integer number (2068094702772).

Almost surely, 2^{21263012032404} is an apocalyptic number.

It is an amenable number.

21263012032404 is an abundant number, since it is smaller than the sum of its proper divisors (28371260834124).

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

21263012032404 is a wasteful number, since it uses less digits than its factorization.

21263012032404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734933015 (or 734933013 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21263012032404 its reverse (40423021036212), we get a palindrome (61686033068616).

The spelling of 21263012032404 in words is "twenty-one trillion, two hundred sixty-three billion, twelve million, thirty-two thousand, four hundred four".