21488258246 has 64 divisors (see below), whose sum is σ = 40484161536. Its totient is φ = 8328096000.

The previous prime is 21488258227. The next prime is 21488258273. The reversal of 21488258246 is 64285288412.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21488258194 and 21488258203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2000831 + ... + 2011541.

It is an arithmetic number, because the mean of its divisors is an integer number (632565024).

Almost surely, 2^21488258246 is an apocalyptic number.

21488258246 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21488258246 is a deficient number, since it is larger than the sum of its proper divisors (18995903290).

21488258246 is a wasteful number, since it uses less digits than its factorization.

21488258246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10957.

The product of its digits is 1966080, while the sum is 50.

The spelling of 21488258246 in words is "twenty-one billion, four hundred eighty-eight million, two hundred fifty-eight thousand, two hundred forty-six".