20400622 has 8 divisors (see below), whose sum is σ = 33382872. Its totient is φ = 9273000.

The previous prime is 20400599. The next prime is 20400631. The reversal of 20400622 is 22600402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20400596 and 20400605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463629 + ... + 463672.

It is an arithmetic number, because the mean of its divisors is an integer number (4172859).

Almost surely, 2^20400622 is an apocalyptic number.

20400622 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20400622 is a deficient number, since it is larger than the sum of its proper divisors (12982250).

20400622 is a wasteful number, since it uses less digits than its factorization.

20400622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927314.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20400622 is about 4516.7047722870. The cubic root of 20400622 is about 273.2422186226.

The spelling of 20400622 in words is "twenty million, four hundred thousand, six hundred twenty-two".