20502474 has 8 divisors (see below), whose sum is σ = 41004960. Its totient is φ = 6834156.

The previous prime is 20502401. The next prime is 20502479. The reversal of 20502474 is 47420502.

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

20502474 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20502479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708534 + ... + 1708545.

It is an arithmetic number, because the mean of its divisors is an integer number (5125620).

Almost surely, 2^20502474 is an apocalyptic number.

20502474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20502474 is a wasteful number, since it uses less digits than its factorization.

20502474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417084.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20502474 is about 4527.9657684218. The cubic root of 20502474 is about 273.6961930067.

Adding to 20502474 its reverse (47420502), we get a palindrome (67922976).

The spelling of 20502474 in words is "twenty million, five hundred two thousand, four hundred seventy-four".