20423432001 has 16 divisors (see below), whose sum is σ = 32952092544. Its totient is φ = 10984030464.

The previous prime is 20423431927. The next prime is 20423432009. The reversal of 20423432001 is 10023432402.

It is not a de Polignac number, because 20423432001 - 2¹⁸ = 20423169857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20423432009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28603890 + ... + 28604603.

It is an arithmetic number, because the mean of its divisors is an integer number (2059505784).

Almost surely, 2^20423432001 is an apocalyptic number.

20423432001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20423432001 is a deficient number, since it is larger than the sum of its proper divisors (12528660543).

20423432001 is a wasteful number, since it uses less digits than its factorization.

20423432001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57208520.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20423432001 its reverse (10023432402), we get a palindrome (30446864403).

The spelling of 20423432001 in words is "twenty billion, four hundred twenty-three million, four hundred thirty-two thousand, one".