20247476 has 12 divisors (see below), whose sum is σ = 37517508. Its totient is φ = 9528192.

The previous prime is 20247457. The next prime is 20247509. The reversal of 20247476 is 67474202.

It can be written as a sum of positive squares in 2 ways, for example, as 7431076 + 12816400 = 2726^2 + 3580^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148811 + ... + 148946.

It is an arithmetic number, because the mean of its divisors is an integer number (3126459).

Almost surely, 2^20247476 is an apocalyptic number.

It is an amenable number.

20247476 is a deficient number, since it is larger than the sum of its proper divisors (17270032).

20247476 is a wasteful number, since it uses less digits than its factorization.

20247476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297778 (or 297776 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 20247476 is about 4499.7195468162. The cubic root of 20247476 is about 272.5567639793.

The spelling of 20247476 in words is "twenty million, two hundred forty-seven thousand, four hundred seventy-six".