21467157274064 has 20 divisors (see below), whose sum is σ = 41868065019360. Its totient is φ = 10662495333600.

The previous prime is 21467157273983. The next prime is 21467157274067. The reversal of 21467157274064 is 46047275176412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21467157274067) 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, 4442703974 + ... + 4442708805.

It is an arithmetic number, because the mean of its divisors is an integer number (2093403250968).

Almost surely, 2^{21467157274064} is an apocalyptic number.

It is an amenable number.

21467157274064 is a deficient number, since it is larger than the sum of its proper divisors (20400907745296).

21467157274064 is a wasteful number, since it uses less digits than its factorization.

21467157274064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8885412938 (or 8885412932 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 56.

The spelling of 21467157274064 in words is "twenty-one trillion, four hundred sixty-seven billion, one hundred fifty-seven million, two hundred seventy-four thousand, sixty-four".