20679045 has 8 divisors (see below), whose sum is σ = 33086496. Its totient is φ = 11028816.

The previous prime is 20679037. The next prime is 20679053. The reversal of 20679045 is 54097602.

It is an interprime number because it is at equal distance from previous prime (20679037) and next prime (20679053).

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

It is not a de Polignac number, because 20679045 - 2³ = 20679037 is a prime.

It is a super-2 number, since 2×20679045² = 855245804224050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20678997 and 20679015.

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, 689287 + ... + 689316.

It is an arithmetic number, because the mean of its divisors is an integer number (4135812).

Almost surely, 2^20679045 is an apocalyptic number.

It is an amenable number.

20679045 is a deficient number, since it is larger than the sum of its proper divisors (12407451).

20679045 is a wasteful number, since it uses less digits than its factorization.

20679045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378611.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20679045 is about 4547.4217970186. The cubic root of 20679045 is about 274.4796551622.

The spelling of 20679045 in words is "twenty million, six hundred seventy-nine thousand, forty-five".