20140961 has 4 divisors (see below), whose sum is σ = 20286000. Its totient is φ = 19995924.

The previous prime is 20140949. The next prime is 20140997. The reversal of 20140961 is 16904102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16904102 = 2 ⋅8452051.

It is a cyclic number.

It is not a de Polignac number, because 20140961 - 2¹⁰ = 20139937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20143961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72311 + ... + 72588.

It is an arithmetic number, because the mean of its divisors is an integer number (5071500).

Almost surely, 2^20140961 is an apocalyptic number.

It is an amenable number.

20140961 is a deficient number, since it is larger than the sum of its proper divisors (145039).

20140961 is a wasteful number, since it uses less digits than its factorization.

20140961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145038.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20140961 is about 4487.8682021646. The cubic root of 20140961 is about 272.0779809932.

The spelling of 20140961 in words is "twenty million, one hundred forty thousand, nine hundred sixty-one".