20966415 has 8 divisors (see below), whose sum is σ = 33546288. Its totient is φ = 11182080.

The previous prime is 20966411. The next prime is 20966431. The reversal of 20966415 is 51466902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20966415 - 2² = 20966411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20966411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698866 + ... + 698895.

It is an arithmetic number, because the mean of its divisors is an integer number (4193286).

Almost surely, 2^20966415 is an apocalyptic number.

20966415 is a deficient number, since it is larger than the sum of its proper divisors (12579873).

20966415 is a wasteful number, since it uses less digits than its factorization.

20966415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397769.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20966415 is about 4578.9098047461. The cubic root of 20966415 is about 275.7452622283.

The spelling of 20966415 in words is "twenty million, nine hundred sixty-six thousand, four hundred fifteen".