20865070 has 8 divisors (see below), whose sum is σ = 37557144. Its totient is φ = 8346024.

The previous prime is 20865067. The next prime is 20865083. The reversal of 20865070 is 7056802.

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

It is a super-2 number, since 2×20865070² = 870702292209800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043244 + ... + 1043263.

It is an arithmetic number, because the mean of its divisors is an integer number (4694643).

Almost surely, 2^20865070 is an apocalyptic number.

20865070 is a deficient number, since it is larger than the sum of its proper divisors (16692074).

20865070 is a wasteful number, since it uses less digits than its factorization.

20865070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086514.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20865070 is about 4567.8299005107. The cubic root of 20865070 is about 275.3002560711.

The spelling of 20865070 in words is "twenty million, eight hundred sixty-five thousand, seventy".