20250061 has 8 divisors (see below), whose sum is σ = 21842744. Its totient is φ = 18662400.

The previous prime is 20250059. The next prime is 20250073. The reversal of 20250061 is 16005202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 722500 + 19527561 = 850^2 + 4419^2 .

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

It is a 6-Lehmer number, since φ(20250061) divides (20250061-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 20250061 - 2¹ = 20250059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20250031) 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, 14965 + ... + 16261.

It is an arithmetic number, because the mean of its divisors is an integer number (2730343).

Almost surely, 2^20250061 is an apocalyptic number.

It is an amenable number.

20250061 is a deficient number, since it is larger than the sum of its proper divisors (1592683).

20250061 is a wasteful number, since it uses less digits than its factorization.

20250061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511.

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

The square root of 20250061 is about 4500.0067777727. The cubic root of 20250061 is about 272.5683626143.

Adding to 20250061 its reverse (16005202), we get a palindrome (36255263).

The spelling of 20250061 in words is "twenty million, two hundred fifty thousand, sixty-one".