21400331134 has 16 divisors (see below), whose sum is σ = 39508303968. Its totient is φ = 8466064992.

The previous prime is 21400331111. The next prime is 21400331159. The reversal of 21400331134 is 43113300412.

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, 58791937 + ... + 58792300.

It is an arithmetic number, because the mean of its divisors is an integer number (2469268998).

Almost surely, 2^21400331134 is an apocalyptic number.

21400331134 is a deficient number, since it is larger than the sum of its proper divisors (18107972834).

21400331134 is a wasteful number, since it uses less digits than its factorization.

21400331134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117584259.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21400331134 its reverse (43113300412), we get a palindrome (64513631546).

The spelling of 21400331134 in words is "twenty-one billion, four hundred million, three hundred thirty-one thousand, one hundred thirty-four".