21401434132 has 48 divisors (see below), whose sum is σ = 41590039680. Its totient is φ = 9574351488.

The previous prime is 21401434129. The next prime is 21401434141. The reversal of 21401434132 is 23143410412.

It is a junction number, because it is equal to n+sod(n) for n = 21401434097 and 21401434106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181969 + ... + 275527.

It is an arithmetic number, because the mean of its divisors is an integer number (866459160).

Almost surely, 2^21401434132 is an apocalyptic number.

It is an amenable number.

21401434132 is a deficient number, since it is larger than the sum of its proper divisors (20188605548).

21401434132 is a wasteful number, since it uses less digits than its factorization.

21401434132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93712 (or 93710 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21401434132 its reverse (23143410412), we get a palindrome (44544844544).

The spelling of 21401434132 in words is "twenty-one billion, four hundred one million, four hundred thirty-four thousand, one hundred thirty-two".