20860416 has 100 divisors (see below), whose sum is σ = 62386632. Its totient is φ = 6939648.

The previous prime is 20860409. The next prime is 20860451. The reversal of 20860416 is 61406802.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20860416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41221 + ... + 41723.

Almost surely, 2^20860416 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 20860416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31193316).

20860416 is an abundant number, since it is smaller than the sum of its proper divisors (41526216).

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

20860416 is an frugal number, since it uses more digits than its factorization.

20860416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20860416 is about 4567.3204398203. The cubic root of 20860416 is about 275.2797857720.

The spelling of 20860416 in words is "twenty million, eight hundred sixty thousand, four hundred sixteen".