20110404431 has 4 divisors (see below), whose sum is σ = 21657358632. Its totient is φ = 18563450232.

The previous prime is 20110404427. The next prime is 20110404451. The reversal of 20110404431 is 13440401102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13440401102 = 2 ⋅6720200551.

It is a cyclic number.

It is not a de Polignac number, because 20110404431 - 2² = 20110404427 is a prime.

It is a super-2 number, since 2×20110404431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110404451) 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, 773477081 + ... + 773477106.

It is an arithmetic number, because the mean of its divisors is an integer number (5414339658).

Almost surely, 2^20110404431 is an apocalyptic number.

20110404431 is a deficient number, since it is larger than the sum of its proper divisors (1546954201).

20110404431 is a wasteful number, since it uses less digits than its factorization.

20110404431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546954200.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20110404431 its reverse (13440401102), we get a palindrome (33550805533).

The spelling of 20110404431 in words is "twenty billion, one hundred ten million, four hundred four thousand, four hundred thirty-one".