21920042074 has 32 divisors (see below), whose sum is σ = 37776324096. Its totient is φ = 9344602800.

The previous prime is 21920042021. The next prime is 21920042099. The reversal of 21920042074 is 47024002912.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4710649 + ... + 4715299.

It is an arithmetic number, because the mean of its divisors is an integer number (1180510128).

Almost surely, 2^21920042074 is an apocalyptic number.

21920042074 is a deficient number, since it is larger than the sum of its proper divisors (15856282022).

21920042074 is a wasteful number, since it uses less digits than its factorization.

21920042074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6370.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 21920042074 its reverse (47024002912), we get a palindrome (68944044986).

The spelling of 21920042074 in words is "twenty-one billion, nine hundred twenty million, forty-two thousand, seventy-four".