21430210945 has 32 divisors (see below), whose sum is σ = 30854960640. Its totient is φ = 14080592640.

The previous prime is 21430210933. The next prime is 21430211021. The reversal of 21430210945 is 54901203412.

It is not a de Polignac number, because 21430210945 - 2⁹ = 21430210433 is a prime.

It is a super-2 number, since 2×21430210945² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 285250 + ... + 352459.

It is an arithmetic number, because the mean of its divisors is an integer number (964217520).

Almost surely, 2^21430210945 is an apocalyptic number.

It is an amenable number.

21430210945 is a deficient number, since it is larger than the sum of its proper divisors (9424749695).

21430210945 is a wasteful number, since it uses less digits than its factorization.

21430210945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637785.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 21430210945 in words is "twenty-one billion, four hundred thirty million, two hundred ten thousand, nine hundred forty-five".