20401716 has 12 divisors (see below), whose sum is σ = 47604032. Its totient is φ = 6800568.

The previous prime is 20401709. The next prime is 20401721. The reversal of 20401716 is 61710402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20401692 and 20401701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850060 + ... + 850083.

Almost surely, 2^20401716 is an apocalyptic number.

It is an amenable number.

20401716 is an abundant number, since it is smaller than the sum of its proper divisors (27202316).

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

20401716 is a wasteful number, since it uses less digits than its factorization.

20401716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700150 (or 1700148 counting only the distinct ones).

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

The square root of 20401716 is about 4516.8258766528. The cubic root of 20401716 is about 273.2471028143.

The spelling of 20401716 in words is "twenty million, four hundred one thousand, seven hundred sixteen".