20697470 has 16 divisors (see below), whose sum is σ = 38875680. Its totient is φ = 7918944.

The previous prime is 20697463. The next prime is 20697487. The reversal of 20697470 is 7479602.

It is a self number, because there is not a number n which added to its sum of digits gives 20697470.

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, 44765 + ... + 45224.

It is an arithmetic number, because the mean of its divisors is an integer number (2429730).

Almost surely, 2^20697470 is an apocalyptic number.

20697470 is a deficient number, since it is larger than the sum of its proper divisors (18178210).

20697470 is a wasteful number, since it uses less digits than its factorization.

20697470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90019.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20697470 is about 4549.4472191685. The cubic root of 20697470 is about 274.5611512915.

The spelling of 20697470 in words is "twenty million, six hundred ninety-seven thousand, four hundred seventy".