20213431001 has 8 divisors (see below), whose sum is σ = 21423193704. Its totient is φ = 19005972480.

The previous prime is 20213430997. The next prime is 20213431019. The reversal of 20213431001 is 10013431202.

It can be written as a sum of positive squares in 4 ways, for example, as 9785957776 + 10427473225 = 98924^2 + 102115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20213431001 - 2² = 20213430997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213431031) 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, 557960 + ... + 593081.

It is an arithmetic number, because the mean of its divisors is an integer number (2677899213).

Almost surely, 2^20213431001 is an apocalyptic number.

It is an amenable number.

20213431001 is a deficient number, since it is larger than the sum of its proper divisors (1209762703).

20213431001 is a wasteful number, since it uses less digits than its factorization.

20213431001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152091.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20213431001 its reverse (10013431202), we get a palindrome (30226862203).

The spelling of 20213431001 in words is "twenty billion, two hundred thirteen million, four hundred thirty-one thousand, one".