20196408 has 64 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 6221312.

The previous prime is 20196389. The next prime is 20196409. The reversal of 20196408 is 80469102.

It is a super-2 number, since 2×20196408² = 815789792204928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20196409) 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, 23653 + ... + 24491.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^20196408 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 20196408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27216000).

20196408 is an abundant number, since it is smaller than the sum of its proper divisors (34235592).

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

20196408 is a wasteful number, since it uses less digits than its factorization.

20196408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20196408 is about 4494.0413883274. The cubic root of 20196408 is about 272.3274243271.

The spelling of 20196408 in words is "twenty million, one hundred ninety-six thousand, four hundred eight".