21401200023 has 32 divisors (see below), whose sum is σ = 34864966656. Its totient is φ = 11398123008.

The previous prime is 21401200019. The next prime is 21401200039. The reversal of 21401200023 is 32000210412.

It is not a de Polignac number, because 21401200023 - 2² = 21401200019 is a prime.

It is a super-2 number, since 2×21401200023² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21401199975 and 21401200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401200823) 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, 254236 + ... + 327777.

It is an arithmetic number, because the mean of its divisors is an integer number (1089530208).

Almost surely, 2^21401200023 is an apocalyptic number.

21401200023 is a deficient number, since it is larger than the sum of its proper divisors (13463766633).

21401200023 is a wasteful number, since it uses less digits than its factorization.

21401200023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582143.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21401200023 its reverse (32000210412), we get a palindrome (53401410435).

The spelling of 21401200023 in words is "twenty-one billion, four hundred one million, two hundred thousand, twenty-three".