20489962 has 4 divisors (see below), whose sum is σ = 30734946. Its totient is φ = 10244980.

The previous prime is 20489957. The next prime is 20489969. The reversal of 20489962 is 26998402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26998402 = 2 ⋅13499201.

It can be written as a sum of positive squares in only one way, i.e., 11840481 + 8649481 = 3441^2 + 2941^2 .

It is a super-2 number, since 2×20489962² = 839677085522888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20489969) 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 as a sum of consecutive naturals, namely, 5122489 + ... + 5122492.

Almost surely, 2^20489962 is an apocalyptic number.

20489962 is a deficient number, since it is larger than the sum of its proper divisors (10244984).

20489962 is a wasteful number, since it uses less digits than its factorization.

20489962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10244983.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 20489962 is about 4526.5839216787. The cubic root of 20489962 is about 273.6405056846.

The spelling of 20489962 in words is "twenty million, four hundred eighty-nine thousand, nine hundred sixty-two".