20401320422 has 48 divisors (see below), whose sum is σ = 36609855120. Its totient is φ = 8498048832.

The previous prime is 20401320419. The next prime is 20401320431. The reversal of 20401320422 is 22402310402.

It is a super-2 number, since 2×20401320422² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20401320394 and 20401320403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 537404 + ... + 574112.

It is an arithmetic number, because the mean of its divisors is an integer number (762705315).

Almost surely, 2^20401320422 is an apocalyptic number.

20401320422 is a deficient number, since it is larger than the sum of its proper divisors (16208534698).

20401320422 is a wasteful number, since it uses less digits than its factorization.

20401320422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36885 (or 36878 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20401320422 its reverse (22402310402), we get a palindrome (42803630824).

The spelling of 20401320422 in words is "twenty billion, four hundred one million, three hundred twenty thousand, four hundred twenty-two".