20460237021 has 24 divisors (see below), whose sum is σ = 33843368000. Its totient is φ = 11668116096.

The previous prime is 20460237013. The next prime is 20460237053. The reversal of 20460237021 is 12073206402.

20460237021 is a `hidden beast` number, since 2 + 0 + 4 + 602 + 37 + 0 + 21 = 666.

It is not a de Polignac number, because 20460237021 - 2³ = 20460237013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20460232021) 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 23 ways as a sum of consecutive naturals, for example, 293980 + ... + 356853.

Almost surely, 2^20460237021 is an apocalyptic number.

20460237021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20460237021 is a deficient number, since it is larger than the sum of its proper divisors (13383130979).

20460237021 is a wasteful number, since it uses less digits than its factorization.

20460237021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651345 (or 651342 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The spelling of 20460237021 in words is "twenty billion, four hundred sixty million, two hundred thirty-seven thousand, twenty-one".