20052755428421 has 8 divisors (see below), whose sum is σ = 20305792388544. Its totient is φ = 19800840584160.

The previous prime is 20052755428403. The next prime is 20052755428423. The reversal of 20052755428421 is 12482455725002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20052755428421 - 2⁶ = 20052755428357 is a prime.

It is a super-2 number, since 2×20052755428421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20052755428423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280493000 + ... + 280564481.

It is an arithmetic number, because the mean of its divisors is an integer number (2538224048568).

Almost surely, 2^{20052755428421} is an apocalyptic number.

It is an amenable number.

20052755428421 is a deficient number, since it is larger than the sum of its proper divisors (253036960123).

20052755428421 is a wasteful number, since it uses less digits than its factorization.

20052755428421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561057931.

The product of its (nonzero) digits is 1792000, while the sum is 47.

The spelling of 20052755428421 in words is "twenty trillion, fifty-two billion, seven hundred fifty-five million, four hundred twenty-eight thousand, four hundred twenty-one".