21214530403 has 16 divisors (see below), whose sum is σ = 23403058560. Its totient is φ = 19069689600.

The previous prime is 21214530397. The next prime is 21214530431. The reversal of 21214530403 is 30403541212.

It is a cyclic number.

It is not a de Polignac number, because 21214530403 - 2²¹ = 21212433251 is a prime.

It is a super-2 number, since 2×21214530403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214536403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240968 + ... + 1257946.

It is an arithmetic number, because the mean of its divisors is an integer number (1462691160).

Almost surely, 2^21214530403 is an apocalyptic number.

21214530403 is a deficient number, since it is larger than the sum of its proper divisors (2188528157).

21214530403 is a wasteful number, since it uses less digits than its factorization.

21214530403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18258.

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 21214530403 in words is "twenty-one billion, two hundred fourteen million, five hundred thirty thousand, four hundred three".