20752421532 has 24 divisors (see below), whose sum is σ = 48457777536. Its totient is φ = 6912408048.

The previous prime is 20752421513. The next prime is 20752421539. The reversal of 20752421532 is 23512425702.

It is a junction number, because it is equal to n+sod(n) for n = 20752421493 and 20752421502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20752421539) 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 7 ways as a sum of consecutive naturals, for example, 616138 + ... + 648945.

It is an arithmetic number, because the mean of its divisors is an integer number (2019074064).

Almost surely, 2^20752421532 is an apocalyptic number.

It is an amenable number.

20752421532 is an abundant number, since it is smaller than the sum of its proper divisors (27705356004).

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

20752421532 is a wasteful number, since it uses less digits than its factorization.

20752421532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266457 (or 1266455 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The spelling of 20752421532 in words is "twenty billion, seven hundred fifty-two million, four hundred twenty-one thousand, five hundred thirty-two".