21334672074 has 16 divisors (see below), whose sum is σ = 44524533312. Its totient is φ = 6802359168.

The previous prime is 21334672057. The next prime is 21334672127. The reversal of 21334672074 is 47027643312.

It is a happy number.

It is a super-4 number, since 4×21334672074⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77299399 + ... + 77299674.

It is an arithmetic number, because the mean of its divisors is an integer number (2782783332).

Almost surely, 2^21334672074 is an apocalyptic number.

21334672074 is an abundant number, since it is smaller than the sum of its proper divisors (23189861238).

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

21334672074 is a wasteful number, since it uses less digits than its factorization.

21334672074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154599101.

The product of its (nonzero) digits is 169344, while the sum is 39.

The spelling of 21334672074 in words is "twenty-one billion, three hundred thirty-four million, six hundred seventy-two thousand, seventy-four".