20197754 has 4 divisors (see below), whose sum is σ = 30296634. Its totient is φ = 10098876.

The previous prime is 20197747. The next prime is 20197757. The reversal of 20197754 is 45779102.

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

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 528529 = 4435^2 + 727^2 .

It is not an unprimeable number, because it can be changed into a prime (20197757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5049437 + ... + 5049440.

Almost surely, 2^20197754 is an apocalyptic number.

20197754 is a deficient number, since it is larger than the sum of its proper divisors (10098880).

20197754 is a wasteful number, since it uses less digits than its factorization.

20197754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10098879.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 20197754 is about 4494.1911396824. The cubic root of 20197754 is about 272.3334739931. Note that the first 3 decimals are identical.

The spelling of 20197754 in words is "twenty million, one hundred ninety-seven thousand, seven hundred fifty-four".