21400134525452 has 12 divisors (see below), whose sum is σ = 37483583811576. Its totient is φ = 10690539150720.

The previous prime is 21400134525403. The next prime is 21400134525467. The reversal of 21400134525452 is 25452543100412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2382022949 + ... + 2382031932.

It is an arithmetic number, because the mean of its divisors is an integer number (3123631984298).

Almost surely, 2^{21400134525452} is an apocalyptic number.

It is an amenable number.

21400134525452 is a deficient number, since it is larger than the sum of its proper divisors (16083449286124).

21400134525452 is a wasteful number, since it uses less digits than its factorization.

21400134525452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764056008 (or 4764056006 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 21400134525452 its reverse (25452543100412), we get a palindrome (46852677625864).

The spelling of 21400134525452 in words is "twenty-one trillion, four hundred billion, one hundred thirty-four million, five hundred twenty-five thousand, four hundred fifty-two".