20447051 has 8 divisors (see below), whose sum is σ = 21112800. Its totient is φ = 19787328.

The previous prime is 20447003. The next prime is 20447057. The reversal of 20447051 is 15074402.

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

It is a cyclic number.

It is not a de Polignac number, because 20447051 - 2¹⁸ = 20184907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20447057) 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, 5975 + ... + 8751.

It is an arithmetic number, because the mean of its divisors is an integer number (2639100).

Almost surely, 2^20447051 is an apocalyptic number.

20447051 is a deficient number, since it is larger than the sum of its proper divisors (665749).

20447051 is a wasteful number, since it uses less digits than its factorization.

20447051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 20447051 is about 4521.8415496344. The cubic root of 20447051 is about 273.4493487611.

The spelling of 20447051 in words is "twenty million, four hundred forty-seven thousand, fifty-one".