21086693452 has 24 divisors (see below), whose sum is σ = 40261555152. Its totient is φ = 9583636800.

The previous prime is 21086693431. The next prime is 21086693479. The reversal of 21086693452 is 25439668012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379738 + ... + 431710.

It is an arithmetic number, because the mean of its divisors is an integer number (1677564798).

Almost surely, 2^21086693452 is an apocalyptic number.

21086693452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21086693452 is a deficient number, since it is larger than the sum of its proper divisors (19174861700).

21086693452 is a wasteful number, since it uses less digits than its factorization.

21086693452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61209 (or 61207 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 21086693452 in words is "twenty-one billion, eighty-six million, six hundred ninety-three thousand, four hundred fifty-two".