20071964 has 36 divisors (see below), whose sum is σ = 39057312. Its totient is φ = 9018240.

The previous prime is 20071963. The next prime is 20071991. The reversal of 20071964 is 46917002.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54509 + ... + 54875.

Almost surely, 2^20071964 is an apocalyptic number.

It is an amenable number.

20071964 is a deficient number, since it is larger than the sum of its proper divisors (18985348).

20071964 is a wasteful number, since it uses less digits than its factorization.

20071964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20071964 is about 4480.1745501710. The cubic root of 20071964 is about 271.7669392018.

Adding to 20071964 its reverse (46917002), we get a palindrome (66988966).

The spelling of 20071964 in words is "twenty million, seventy-one thousand, nine hundred sixty-four".