20421435348 has 72 divisors (see below), whose sum is σ = 51997300992. Its totient is φ = 6757612992.

The previous prime is 20421435341. The next prime is 20421435401. The reversal of 20421435348 is 84353412402.

It is a super-2 number, since 2×20421435348² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421435341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5992261 + ... + 5995667.

It is an arithmetic number, because the mean of its divisors is an integer number (722184736).

Almost surely, 2^20421435348 is an apocalyptic number.

It is an amenable number.

20421435348 is an abundant number, since it is smaller than the sum of its proper divisors (31575865644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20421435348 is a wasteful number, since it uses less digits than its factorization.

20421435348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581 (or 4576 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 20421435348 in words is "twenty billion, four hundred twenty-one million, four hundred thirty-five thousand, three hundred forty-eight".