20243431031421 has 32 divisors (see below), whose sum is σ = 30187411555840. Its totient is φ = 11986177984704.

The previous prime is 20243431031413. The next prime is 20243431031431. The reversal of 20243431031421 is 12413013434202.

It is not a de Polignac number, because 20243431031421 - 2³ = 20243431031413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243431031431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89971351 + ... + 90196068.

It is an arithmetic number, because the mean of its divisors is an integer number (943356611120).

Almost surely, 2^{20243431031421} is an apocalyptic number.

It is an amenable number.

20243431031421 is a deficient number, since it is larger than the sum of its proper divisors (9943980524419).

20243431031421 is a wasteful number, since it uses less digits than its factorization.

20243431031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180167545.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 20243431031421 its reverse (12413013434202), we get a palindrome (32656444465623).

The spelling of 20243431031421 in words is "twenty trillion, two hundred forty-three billion, four hundred thirty-one million, thirty-one thousand, four hundred twenty-one".