21030273748 has 24 divisors (see below), whose sum is σ = 40380792480. Its totient is φ = 9503956320.

The previous prime is 21030273683. The next prime is 21030273791. The reversal of 21030273748 is 84737203012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1373778 + ... + 1389001.

It is an arithmetic number, because the mean of its divisors is an integer number (1682533020).

Almost surely, 2^21030273748 is an apocalyptic number.

It is an amenable number.

21030273748 is a deficient number, since it is larger than the sum of its proper divisors (19350518732).

21030273748 is a wasteful number, since it uses less digits than its factorization.

21030273748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762967 (or 2762965 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 21030273748 in words is "twenty-one billion, thirty million, two hundred seventy-three thousand, seven hundred forty-eight".