20401522 has 16 divisors (see below), whose sum is σ = 31534272. Its totient is φ = 9893520.

The previous prime is 20401501. The next prime is 20401523. The reversal of 20401522 is 22510402.

It is a junction number, because it is equal to n+sod(n) for n = 20401496 and 20401505.

It is not an unprimeable number, because it can be changed into a prime (20401523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12747 + ... + 14257.

It is an arithmetic number, because the mean of its divisors is an integer number (1970892).

Almost surely, 2^20401522 is an apocalyptic number.

20401522 is a deficient number, since it is larger than the sum of its proper divisors (11132750).

20401522 is a wasteful number, since it uses less digits than its factorization.

20401522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20401522 is about 4516.8044013439. The cubic root of 20401522 is about 273.2462367089.

Adding to 20401522 its reverse (22510402), we get a palindrome (42911924).

The spelling of 20401522 in words is "twenty million, four hundred one thousand, five hundred twenty-two".