20431011040 has 48 divisors (see below), whose sum is σ = 52656292080. Its totient is φ = 7429457920.

The previous prime is 20431011037. The next prime is 20431011091. The reversal of 20431011040 is 4011013402.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5802505 + ... + 5806024.

It is an arithmetic number, because the mean of its divisors is an integer number (1097006085).

Almost surely, 2^20431011040 is an apocalyptic number.

20431011040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431011040 is an abundant number, since it is smaller than the sum of its proper divisors (32225281040).

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

20431011040 is a wasteful number, since it uses less digits than its factorization.

20431011040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11608555 (or 11608547 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20431011040 its reverse (4011013402), we get a palindrome (24442024442).

The spelling of 20431011040 in words is "twenty billion, four hundred thirty-one million, eleven thousand, forty".