21402010403 has 8 divisors (see below), whose sum is σ = 21655418400. Its totient is φ = 21148890048.

The previous prime is 21402010387. The next prime is 21402010471. The reversal of 21402010403 is 30401020412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21402010403 - 2⁴ = 21402010387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21402010103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79658 + ... + 221696.

It is an arithmetic number, because the mean of its divisors is an integer number (2706927300).

Almost surely, 2^21402010403 is an apocalyptic number.

21402010403 is a deficient number, since it is larger than the sum of its proper divisors (253407997).

21402010403 is a wasteful number, since it uses less digits than its factorization.

21402010403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143821.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21402010403 its reverse (30401020412), we get a palindrome (51803030815).

The spelling of 21402010403 in words is "twenty-one billion, four hundred two million, ten thousand, four hundred three".