20040492021 has 48 divisors (see below), whose sum is σ = 30812503680. Its totient is φ = 11561334400.

The previous prime is 20040492011. The next prime is 20040492053. The reversal of 20040492021 is 12029404002.

It is not a de Polignac number, because 20040492021 - 2⁶ = 20040491957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20040491982 and 20040492000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040492001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 734011 + ... + 760823.

It is an arithmetic number, because the mean of its divisors is an integer number (641927160).

Almost surely, 2^20040492021 is an apocalyptic number.

It is an amenable number.

20040492021 is a deficient number, since it is larger than the sum of its proper divisors (10772011659).

20040492021 is a wasteful number, since it uses less digits than its factorization.

20040492021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26938 (or 26927 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20040492021 its reverse (12029404002), we get a palindrome (32069896023).

The spelling of 20040492021 in words is "twenty billion, forty million, four hundred ninety-two thousand, twenty-one".