21214036503428 has 12 divisors (see below), whose sum is σ = 37125052105680. Its totient is φ = 10606878758952.

The previous prime is 21214036503427. The next prime is 21214036503467. The reversal of 21214036503428 is 82430563041212.

It is not an unprimeable number, because it can be changed into a prime (21214036503421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34530638 + ... + 35139621.

It is an arithmetic number, because the mean of its divisors is an integer number (3093754342140).

Almost surely, 2^{21214036503428} is an apocalyptic number.

It is an amenable number.

21214036503428 is a deficient number, since it is larger than the sum of its proper divisors (15911015602252).

21214036503428 is a wasteful number, since it uses less digits than its factorization.

21214036503428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69746386 (or 69746384 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 21214036503428 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred three thousand, four hundred twenty-eight".