21948734 has 16 divisors (see below), whose sum is σ = 35024400. Its totient is φ = 10280064.

The previous prime is 21948721. The next prime is 21948749. The reversal of 21948734 is 43784912.

It is a super-3 number, since 3×21948734³ (a number of 23 digits) contains 333 as substring.

It is a congruent 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, 6377 + ... + 9195.

It is an arithmetic number, because the mean of its divisors is an integer number (2189025).

Almost surely, 2^21948734 is an apocalyptic number.

21948734 is a deficient number, since it is larger than the sum of its proper divisors (13075666).

21948734 is a wasteful number, since it uses less digits than its factorization.

21948734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067.

The product of its digits is 48384, while the sum is 38.

The square root of 21948734 is about 4684.9475984263. The cubic root of 21948734 is about 279.9861132569.

The spelling of 21948734 in words is "twenty-one million, nine hundred forty-eight thousand, seven hundred thirty-four".