21407231003 has 2 divisors, whose sum is σ = 21407231004. Its totient is φ = 21407231002.

The previous prime is 21407230967. The next prime is 21407231029. The reversal of 21407231003 is 30013270412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21407231003 - 2⁶ = 21407230939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21407231003.

It is not a weakly prime, because it can be changed into another prime (21407231903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10703615501 + 10703615502.

It is an arithmetic number, because the mean of its divisors is an integer number (10703615502).

Almost surely, 2^21407231003 is an apocalyptic number.

21407231003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21407231003 is an equidigital number, since it uses as much as digits as its factorization.

21407231003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The spelling of 21407231003 in words is "twenty-one billion, four hundred seven million, two hundred thirty-one thousand, three".