20193404 has 24 divisors (see below), whose sum is σ = 44059008. Its totient is φ = 7867440.

The previous prime is 20193347. The next prime is 20193419. The reversal of 20193404 is 40439102.

It is a self number, because there is not a number n which added to its sum of digits gives 20193404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32474 + ... + 33089.

It is an arithmetic number, because the mean of its divisors is an integer number (1835792).

Almost surely, 2^20193404 is an apocalyptic number.

It is an amenable number.

20193404 is an abundant number, since it is smaller than the sum of its proper divisors (23865604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20193404 is a wasteful number, since it uses less digits than its factorization.

20193404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65585 (or 65583 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20193404 is about 4493.7071555677. The cubic root of 20193404 is about 272.3139217256.

The spelling of 20193404 in words is "twenty million, one hundred ninety-three thousand, four hundred four".