21789860026 has 16 divisors (see below), whose sum is σ = 35700238080. Its totient is φ = 9892230880.

The previous prime is 21789860023. The next prime is 21789860107. The reversal of 21789860026 is 62006898712.

It is not an unprimeable number, because it can be changed into a prime (21789860023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594346 + ... + 629941.

It is an arithmetic number, because the mean of its divisors is an integer number (2231264880).

Almost surely, 2^21789860026 is an apocalyptic number.

21789860026 is a deficient number, since it is larger than the sum of its proper divisors (13910378054).

21789860026 is a wasteful number, since it uses less digits than its factorization.

21789860026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225109.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 21789860026 in words is "twenty-one billion, seven hundred eighty-nine million, eight hundred sixty thousand, twenty-six".