21060234858 has 32 divisors (see below), whose sum is σ = 45480254400. Its totient is φ = 6462965376.

The previous prime is 21060234851. The next prime is 21060234907. The reversal of 21060234858 is 85843206012.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (21060234851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326643 + ... + 385766.

It is an arithmetic number, because the mean of its divisors is an integer number (1421257950).

Almost surely, 2^21060234858 is an apocalyptic number.

21060234858 is an abundant number, since it is smaller than the sum of its proper divisors (24420019542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21060234858 is a wasteful number, since it uses less digits than its factorization.

21060234858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712806.

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 21060234858 in words is "twenty-one billion, sixty million, two hundred thirty-four thousand, eight hundred fifty-eight".