21064087429 has 16 divisors (see below), whose sum is σ = 26706839040. Its totient is φ = 16135374960.

The previous prime is 21064087411. The next prime is 21064087441. The reversal of 21064087429 is 92478046012.

It is a cyclic number.

It is not a de Polignac number, because 21064087429 - 2¹¹ = 21064085381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21064087129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2313759 + ... + 2322844.

It is an arithmetic number, because the mean of its divisors is an integer number (1669177440).

Almost surely, 2^21064087429 is an apocalyptic number.

It is an amenable number.

21064087429 is a deficient number, since it is larger than the sum of its proper divisors (5642751611).

21064087429 is a wasteful number, since it uses less digits than its factorization.

21064087429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636680.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 21064087429 in words is "twenty-one billion, sixty-four million, eighty-seven thousand, four hundred twenty-nine".