21430001451 has 8 divisors (see below), whose sum is σ = 28649940880. Its totient is φ = 14248364832.

The previous prime is 21430001449. The next prime is 21430001459. The reversal of 21430001451 is 15410003412.

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

It is not a de Polignac number, because 21430001451 - 2¹ = 21430001449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21430001459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9574396 + ... + 9576633.

It is an arithmetic number, because the mean of its divisors is an integer number (3581242610).

Almost surely, 2^21430001451 is an apocalyptic number.

21430001451 is a deficient number, since it is larger than the sum of its proper divisors (7219939429).

21430001451 is a wasteful number, since it uses less digits than its factorization.

21430001451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19151405.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21430001451 its reverse (15410003412), we get a palindrome (36840004863).

The spelling of 21430001451 in words is "twenty-one billion, four hundred thirty million, one thousand, four hundred fifty-one".