20401452 has 18 divisors (see below), whose sum is σ = 51570428. Its totient is φ = 6800472.

The previous prime is 20401439. The next prime is 20401453. The reversal of 20401452 is 25410402.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20401453) 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 5 ways as a sum of consecutive naturals, for example, 283318 + ... + 283389.

Almost surely, 2^20401452 is an apocalyptic number.

It is an amenable number.

20401452 is an abundant number, since it is smaller than the sum of its proper divisors (31168976).

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

20401452 is a wasteful number, since it uses less digits than its factorization.

20401452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566717 (or 566712 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20401452 is about 4516.7966524961. The cubic root of 20401452 is about 273.2459241953.

Adding to 20401452 its reverse (25410402), we get a palindrome (45811854).

The spelling of 20401452 in words is "twenty million, four hundred one thousand, four hundred fifty-two".