20251006 has 4 divisors (see below), whose sum is σ = 30376512. Its totient is φ = 10125502.

The previous prime is 20250991. The next prime is 20251013. The reversal of 20251006 is 60015202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5062750 + ... + 5062753.

It is an arithmetic number, because the mean of its divisors is an integer number (7594128).

Almost surely, 2^20251006 is an apocalyptic number.

20251006 is a deficient number, since it is larger than the sum of its proper divisors (10125506).

20251006 is a wasteful number, since it uses less digits than its factorization.

20251006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10125505.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20251006 is about 4500.1117763896. Note that the first 3 decimals coincide. The cubic root of 20251006 is about 272.5726024879.

Adding to 20251006 its reverse (60015202), we get a palindrome (80266208).

The spelling of 20251006 in words is "twenty million, two hundred fifty-one thousand, six".