20047142 has 8 divisors (see below), whose sum is σ = 31040832. Its totient is φ = 9700200.

The previous prime is 20047133. The next prime is 20047151. The reversal of 20047142 is 24174002.

It is an interprime number because it is at equal distance from previous prime (20047133) and next prime (20047151).

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

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, 161609 + ... + 161732.

It is an arithmetic number, because the mean of its divisors is an integer number (3880104).

Almost surely, 2^20047142 is an apocalyptic number.

20047142 is a deficient number, since it is larger than the sum of its proper divisors (10993690).

20047142 is a wasteful number, since it uses less digits than its factorization.

20047142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323374.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20047142 is about 4477.4034886304. The cubic root of 20047142 is about 271.6548661031.

The spelling of 20047142 in words is "twenty million, forty-seven thousand, one hundred forty-two".