21274078746 has 8 divisors (see below), whose sum is σ = 42548157504. Its totient is φ = 7091359580.

The previous prime is 21274078741. The next prime is 21274078753. The reversal of 21274078746 is 64787047212.

21274078746 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

21274078746 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21274078695 and 21274078704.

It is not an unprimeable number, because it can be changed into a prime (21274078741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772839890 + ... + 1772839901.

It is an arithmetic number, because the mean of its divisors is an integer number (5318519688).

Almost surely, 2^21274078746 is an apocalyptic number.

21274078746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21274078746 is a wasteful number, since it uses less digits than its factorization.

21274078746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545679796.

The product of its (nonzero) digits is 1053696, while the sum is 48.

The spelling of 21274078746 in words is "twenty-one billion, two hundred seventy-four million, seventy-eight thousand, seven hundred forty-six".