20170416 has 80 divisors (see below), whose sum is σ = 60067584. Its totient is φ = 5713152.

The previous prime is 20170391. The next prime is 20170421. The reversal of 20170416 is 61407102.

It is a super-2 number, since 2×20170416² = 813691363226112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20170392 and 20170401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57955 + ... + 58301.

Almost surely, 2^20170416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20170416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30033792).

20170416 is an abundant number, since it is smaller than the sum of its proper divisors (39897168).

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

20170416 is a wasteful number, since it uses less digits than its factorization.

20170416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20170416 is about 4491.1486281351. The cubic root of 20170416 is about 272.2105492025.

20170416 divided by its product of nonzero digits (336) gives a triangular number (60031 = T₃₄₆).

Adding to 20170416 its reverse (61407102), we get a palindrome (81577518).

The spelling of 20170416 in words is "twenty million, one hundred seventy thousand, four hundred sixteen".