20487467 has 32 divisors (see below), whose sum is σ = 27922944. Its totient is φ = 14515200.

The previous prime is 20487449. The next prime is 20487469. The reversal of 20487467 is 76478402.

It is not a de Polignac number, because 20487467 - 2⁶ = 20487403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20487467.

It is not an unprimeable number, because it can be changed into a prime (20487469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96992 + ... + 97202.

It is an arithmetic number, because the mean of its divisors is an integer number (872592).

Almost surely, 2^20487467 is an apocalyptic number.

20487467 is a deficient number, since it is larger than the sum of its proper divisors (7435477).

20487467 is a wasteful number, since it uses less digits than its factorization.

20487467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 20487467 is about 4526.3083191493. The cubic root of 20487467 is about 273.6293984446.

The spelling of 20487467 in words is "twenty million, four hundred eighty-seven thousand, four hundred sixty-seven".