21306246154 has 8 divisors (see below), whose sum is σ = 32409501408. Its totient is φ = 10503079020.

The previous prime is 21306246139. The next prime is 21306246179. The reversal of 21306246154 is 45164260312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21306246154² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 75021852 + ... + 75022135.

It is an arithmetic number, because the mean of its divisors is an integer number (4051187676).

Almost surely, 2^21306246154 is an apocalyptic number.

21306246154 is a deficient number, since it is larger than the sum of its proper divisors (11103255254).

21306246154 is a wasteful number, since it uses less digits than its factorization.

21306246154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150044060.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 21306246154 in words is "twenty-one billion, three hundred six million, two hundred forty-six thousand, one hundred fifty-four".