20210544542 has 16 divisors (see below), whose sum is σ = 31204638720. Its totient is φ = 9812384568.

The previous prime is 20210544533. The next prime is 20210544553. The reversal of 20210544542 is 24544501202.

It is a super-2 number, since 2×20210544542² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834542 + ... + 858417.

It is an arithmetic number, because the mean of its divisors is an integer number (1950289920).

Almost surely, 2^20210544542 is an apocalyptic number.

20210544542 is a deficient number, since it is larger than the sum of its proper divisors (10994094178).

20210544542 is a wasteful number, since it uses less digits than its factorization.

20210544542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693135.

The product of its (nonzero) digits is 12800, while the sum is 29.

The spelling of 20210544542 in words is "twenty billion, two hundred ten million, five hundred forty-four thousand, five hundred forty-two".