20492547 has 8 divisors (see below), whose sum is σ = 27465744. Its totient is φ = 13590528.

The previous prime is 20492543. The next prime is 20492551. The reversal of 20492547 is 74529402.

It is an interprime number because it is at equal distance from previous prime (20492543) and next prime (20492551).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20492547 - 2² = 20492543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20492543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17118 + ... + 18275.

It is an arithmetic number, because the mean of its divisors is an integer number (3433218).

Almost surely, 2^20492547 is an apocalyptic number.

20492547 is a deficient number, since it is larger than the sum of its proper divisors (6973197).

20492547 is a wasteful number, since it uses less digits than its factorization.

20492547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35589.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20492547 is about 4526.8694480844. The cubic root of 20492547 is about 273.6520126356.

The spelling of 20492547 in words is "twenty million, four hundred ninety-two thousand, five hundred forty-seven".