20214542421 has 12 divisors (see below), whose sum is σ = 29234015980. Its totient is φ = 13460100480.

The previous prime is 20214542407. The next prime is 20214542429. The reversal of 20214542421 is 12424541202.

It is a happy number.

20214542421 is a `hidden beast` number, since 2 + 0 + 214 + 5 + 424 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13239954225 + 6974588196 = 115065^2 + 83514^2 .

It is not a de Polignac number, because 20214542421 - 2⁵ = 20214542389 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 (20214542429) 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, 1347220 + ... + 1362141.

Almost surely, 2^20214542421 is an apocalyptic number.

It is an amenable number.

20214542421 is a deficient number, since it is larger than the sum of its proper divisors (9019473559).

20214542421 is a wasteful number, since it uses less digits than its factorization.

20214542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710196 (or 2710193 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The spelling of 20214542421 in words is "twenty billion, two hundred fourteen million, five hundred forty-two thousand, four hundred twenty-one".