20541970 has 8 divisors (see below), whose sum is σ = 36975564. Its totient is φ = 8216784.

The previous prime is 20541949. The next prime is 20541973. The reversal of 20541970 is 7914502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19633761 + 908209 = 4431^2 + 953^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20541973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1027089 + ... + 1027108.

Almost surely, 2^20541970 is an apocalyptic number.

20541970 is a deficient number, since it is larger than the sum of its proper divisors (16433594).

20541970 is a wasteful number, since it uses less digits than its factorization.

20541970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054204.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20541970 is about 4532.3250104113. The cubic root of 20541970 is about 273.8718298730.

The spelling of 20541970 in words is "twenty million, five hundred forty-one thousand, nine hundred seventy".