20051416 has 64 divisors (see below), whose sum is σ = 48026880. Its totient is φ = 7620480.

The previous prime is 20051411. The next prime is 20051431. The reversal of 20051416 is 61415002.

It is a junction number, because it is equal to n+sod(n) for n = 20051393 and 20051402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20051411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26110 + ... + 26866.

It is an arithmetic number, because the mean of its divisors is an integer number (750420).

Almost surely, 2^20051416 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 20051416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24013440).

20051416 is an abundant number, since it is smaller than the sum of its proper divisors (27975464).

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

20051416 is a wasteful number, since it uses less digits than its factorization.

20051416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20051416 is about 4477.8807487471. The cubic root of 20051416 is about 271.6741701082.

Adding to 20051416 its reverse (61415002), we get a palindrome (81466418).

The spelling of 20051416 in words is "twenty million, fifty-one thousand, four hundred sixteen".