20474992 has 10 divisors (see below), whose sum is σ = 39670328. Its totient is φ = 10237488.

The previous prime is 20474969. The next prime is 20475001. The reversal of 20474992 is 29947402.

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, 639828 + ... + 639859.

Almost surely, 2^20474992 is an apocalyptic number.

It is an amenable number.

20474992 is a deficient number, since it is larger than the sum of its proper divisors (19195336).

20474992 is a wasteful number, since it uses less digits than its factorization.

20474992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279695 (or 1279689 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20474992 is about 4524.9300547080. The cubic root of 20474992 is about 273.5738487140.

The spelling of 20474992 in words is "twenty million, four hundred seventy-four thousand, nine hundred ninety-two".