21430451014 has 16 divisors (see below), whose sum is σ = 36741616128. Its totient is φ = 9183553992.

The previous prime is 21430450991. The next prime is 21430451027. The reversal of 21430451014 is 41015403412.

It is a self number, because there is not a number n which added to its sum of digits gives 21430451014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77587 + ... + 221089.

It is an arithmetic number, because the mean of its divisors is an integer number (2296351008).

Almost surely, 2^21430451014 is an apocalyptic number.

21430451014 is a deficient number, since it is larger than the sum of its proper divisors (15311165114).

21430451014 is a wasteful number, since it uses less digits than its factorization.

21430451014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154179.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21430451014 its reverse (41015403412), we get a palindrome (62445854426).

The spelling of 21430451014 in words is "twenty-one billion, four hundred thirty million, four hundred fifty-one thousand, fourteen".