20401350 has 48 divisors (see below), whose sum is σ = 51788352. Its totient is φ = 5312160.

The previous prime is 20401349. The next prime is 20401351. The reversal of 20401350 is 5310402.

It is an interprime number because it is at equal distance from previous prime (20401349) and next prime (20401351).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401351) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4869 + ... + 8031.

It is an arithmetic number, because the mean of its divisors is an integer number (1078924).

Almost surely, 2^20401350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20401350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25894176).

20401350 is an abundant number, since it is smaller than the sum of its proper divisors (31387002).

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

20401350 is a wasteful number, since it uses less digits than its factorization.

20401350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221 (or 3216 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20401350 is about 4516.7853612940. The cubic root of 20401350 is about 273.2454688171.

Adding to 20401350 its reverse (5310402), we get a palindrome (25711752).

The spelling of 20401350 in words is "twenty million, four hundred one thousand, three hundred fifty".