20693670 has 16 divisors (see below), whose sum is σ = 49664880. Its totient is φ = 5518304.

The previous prime is 20693663. The next prime is 20693671. The reversal of 20693670 is 7639602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20693671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344865 + ... + 344924.

It is an arithmetic number, because the mean of its divisors is an integer number (3104055).

Almost surely, 2^20693670 is an apocalyptic number.

20693670 is an abundant number, since it is smaller than the sum of its proper divisors (28971210).

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

20693670 is a wasteful number, since it uses less digits than its factorization.

20693670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689799.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 20693670 is about 4549.0295668417. The cubic root of 20693670 is about 274.5443473660.

The spelling of 20693670 in words is "twenty million, six hundred ninety-three thousand, six hundred seventy".