20401382 has 4 divisors (see below), whose sum is σ = 30602076. Its totient is φ = 10200690.

The previous prime is 20401361. The next prime is 20401397. The reversal of 20401382 is 28310402.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100344 + ... + 5100347.

It is an arithmetic number, because the mean of its divisors is an integer number (7650519).

Almost surely, 2^20401382 is an apocalyptic number.

20401382 is a deficient number, since it is larger than the sum of its proper divisors (10200694).

20401382 is a wasteful number, since it uses less digits than its factorization.

20401382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200693.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20401382 is about 4516.7889036350. The cubic root of 20401382 is about 273.2456116810.

Adding to 20401382 its reverse (28310402), we get a palindrome (48711784).

The spelling of 20401382 in words is "twenty million, four hundred one thousand, three hundred eighty-two".