20197480 has 16 divisors (see below), whose sum is σ = 45444420. Its totient is φ = 8078976.

The previous prime is 20197477. The next prime is 20197501. The reversal of 20197480 is 8479102.

It can be written as a sum of positive squares in 2 ways, for example, as 20196036 + 1444 = 4494^2 + 38^2 .

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, 252429 + ... + 252508.

Almost surely, 2^20197480 is an apocalyptic number.

20197480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20197480 is an abundant number, since it is smaller than the sum of its proper divisors (25246940).

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

20197480 is a wasteful number, since it uses less digits than its factorization.

20197480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504948 (or 504944 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20197480 is about 4494.1606557843. The cubic root of 20197480 is about 272.3322425078.

The spelling of 20197480 in words is "twenty million, one hundred ninety-seven thousand, four hundred eighty".