20709374 has 16 divisors (see below), whose sum is σ = 35634048. Its totient is φ = 8842392.

The previous prime is 20709347. The next prime is 20709391. The reversal of 20709374 is 47390702.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20709374.

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, 1349 + ... + 6575.

It is an arithmetic number, because the mean of its divisors is an integer number (2227128).

Almost surely, 2^20709374 is an apocalyptic number.

20709374 is a deficient number, since it is larger than the sum of its proper divisors (14924674).

20709374 is a wasteful number, since it uses less digits than its factorization.

20709374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20709374 is about 4550.7553219218. The cubic root of 20709374 is about 274.6137784894.

The spelling of 20709374 in words is "twenty million, seven hundred nine thousand, three hundred seventy-four".