20501046 has 16 divisors (see below), whose sum is σ = 45558000. Its totient is φ = 6833664.

The previous prime is 20501029. The next prime is 20501069. The reversal of 20501046 is 64010502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 189771 + ... + 189878.

It is an arithmetic number, because the mean of its divisors is an integer number (2847375).

Almost surely, 2^20501046 is an apocalyptic number.

20501046 is an abundant number, since it is smaller than the sum of its proper divisors (25056954).

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

20501046 is a wasteful number, since it uses less digits than its factorization.

20501046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379660 (or 379654 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20501046 is about 4527.8080789715. The cubic root of 20501046 is about 273.6898385340.

Adding to 20501046 its reverse (64010502), we get a palindrome (84511548).

The spelling of 20501046 in words is "twenty million, five hundred one thousand, forty-six".