20416440031 has 4 divisors (see below), whose sum is σ = 21986935432. Its totient is φ = 18845944632.

The previous prime is 20416440019. The next prime is 20416440137. The reversal of 20416440031 is 13004461402.

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

It is a cyclic number.

It is not a de Polignac number, because 20416440031 - 2⁷ = 20416439903 is a prime.

It is a super-2 number, since 2×20416440031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20416439978 and 20416440005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20416446031) 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, 785247681 + ... + 785247706.

It is an arithmetic number, because the mean of its divisors is an integer number (5496733858).

Almost surely, 2^20416440031 is an apocalyptic number.

20416440031 is a deficient number, since it is larger than the sum of its proper divisors (1570495401).

20416440031 is a wasteful number, since it uses less digits than its factorization.

20416440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570495400.

The product of its (nonzero) digits is 2304, while the sum is 25.

The spelling of 20416440031 in words is "twenty billion, four hundred sixteen million, four hundred forty thousand, thirty-one".