20735970 has 16 divisors (see below), whose sum is σ = 49766400. Its totient is φ = 5529584.

The previous prime is 20735969. The next prime is 20736017. The reversal of 20735970 is 7953702.

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, 345570 + ... + 345629.

It is an arithmetic number, because the mean of its divisors is an integer number (3110400).

Almost surely, 2^20735970 is an apocalyptic number.

20735970 is an abundant number, since it is smaller than the sum of its proper divisors (29030430).

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

20735970 is a wasteful number, since it uses less digits than its factorization.

20735970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691209.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 20735970 is about 4553.6765366020. The cubic root of 20735970 is about 274.7312857227.

The spelling of 20735970 in words is "twenty million, seven hundred thirty-five thousand, nine hundred seventy".