20057961 has 32 divisors (see below), whose sum is σ = 34430976. Its totient is φ = 10080000.

The previous prime is 20057953. The next prime is 20057963. The reversal of 20057961 is 16975002.

It is not a de Polignac number, because 20057961 - 2³ = 20057953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20057963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5761 + ... + 8561.

It is an arithmetic number, because the mean of its divisors is an integer number (1075968).

Almost surely, 2^20057961 is an apocalyptic number.

20057961 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20057961 is a deficient number, since it is larger than the sum of its proper divisors (14373015).

20057961 is a wasteful number, since it uses less digits than its factorization.

20057961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 20057961 is about 4478.6115035801. The cubic root of 20057961 is about 271.7037260261.

The spelling of 20057961 in words is "twenty million, fifty-seven thousand, nine hundred sixty-one".