20311004040 has 32 divisors (see below), whose sum is σ = 60933012480. Its totient is φ = 5416267712.

The previous prime is 20311004011. The next prime is 20311004041. The reversal of 20311004040 is 4040011302.

It is a super-2 number, since 2×20311004040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20311004041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84629064 + ... + 84629303.

It is an arithmetic number, because the mean of its divisors is an integer number (1904156640).

Almost surely, 2^20311004040 is an apocalyptic number.

20311004040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311004040 is an abundant number, since it is smaller than the sum of its proper divisors (40622008440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311004040 is a wasteful number, since it uses less digits than its factorization.

20311004040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169258381 (or 169258377 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20311004040 its reverse (4040011302), we get a palindrome (24351015342).

It can be divided in two parts, 2031 and 1004040, that added together give a triangular number (1006071 = T₁₄₁₈).

The spelling of 20311004040 in words is "twenty billion, three hundred eleven million, four thousand, forty".