20487246 has 16 divisors (see below), whose sum is σ = 44126544. Its totient is φ = 6303744.

The previous prime is 20487211. The next prime is 20487251. The reversal of 20487246 is 64278402.

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, 131251 + ... + 131406.

It is an arithmetic number, because the mean of its divisors is an integer number (2757909).

Almost surely, 2^20487246 is an apocalyptic number.

20487246 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20487246 is an abundant number, since it is smaller than the sum of its proper divisors (23639298).

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

20487246 is a wasteful number, since it uses less digits than its factorization.

20487246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262675.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 20487246 is about 4526.2839062525. The cubic root of 20487246 is about 273.6284145535.

The spelling of 20487246 in words is "twenty million, four hundred eighty-seven thousand, two hundred forty-six".