20400364023 has 16 divisors (see below), whose sum is σ = 29301857760. Its totient is φ = 12550201344.

The previous prime is 20400364001. The next prime is 20400364043. The reversal of 20400364023 is 32046300402.

It is a happy number.

It is not a de Polignac number, because 20400364023 - 2¹³ = 20400355831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20400363984 and 20400364002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400364043) 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, 50263 + ... + 208151.

It is an arithmetic number, because the mean of its divisors is an integer number (1831366110).

Almost surely, 2^20400364023 is an apocalyptic number.

20400364023 is a deficient number, since it is larger than the sum of its proper divisors (8901493737).

20400364023 is a wasteful number, since it uses less digits than its factorization.

20400364023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161218.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20400364023 its reverse (32046300402), we get a palindrome (52446664425).

The spelling of 20400364023 in words is "twenty billion, four hundred million, three hundred sixty-four thousand, twenty-three".