20512514421 has 12 divisors (see below), whose sum is σ = 33861928672. Its totient is φ = 11721436776.

The previous prime is 20512514383. The next prime is 20512514431. The reversal of 20512514421 is 12441521502.

It is a happy number.

20512514421 is a `hidden beast` number, since 2 + 0 + 512 + 5 + 144 + 2 + 1 = 666.

It is not a de Polignac number, because 20512514421 - 2¹⁴ = 20512498037 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 (20512514431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162797671 + ... + 162797796.

Almost surely, 2^20512514421 is an apocalyptic number.

20512514421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20512514421 is a deficient number, since it is larger than the sum of its proper divisors (13349414251).

20512514421 is a wasteful number, since it uses less digits than its factorization.

20512514421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325595480 (or 325595477 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 20512514421 in words is "twenty billion, five hundred twelve million, five hundred fourteen thousand, four hundred twenty-one".