20000408 has 8 divisors (see below), whose sum is σ = 37500780. Its totient is φ = 10000200.

The previous prime is 20000389. The next prime is 20000429. The reversal of 20000408 is 80400002.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20000392 and 20000401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250018 + ... + 1250033.

Almost surely, 2^20000408 is an apocalyptic number.

It is an amenable number.

20000408 is a deficient number, since it is larger than the sum of its proper divisors (17500372).

20000408 is a wasteful number, since it uses less digits than its factorization.

20000408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500057 (or 2500053 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 20000408 is about 4472.1815705537. The cubic root of 20000408 is about 271.4436074509.

The spelling of 20000408 in words is "twenty million, four hundred eight", and thus it is an aban number.