20555450542 has 32 divisors (see below), whose sum is σ = 35444822400. Its totient is φ = 8842053600.

The previous prime is 20555450471. The next prime is 20555450551. The reversal of 20555450542 is 24505455502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367209 + ... + 419467.

It is an arithmetic number, because the mean of its divisors is an integer number (1107650700).

Almost surely, 2^20555450542 is an apocalyptic number.

20555450542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20555450542 is a deficient number, since it is larger than the sum of its proper divisors (14889371858).

20555450542 is a wasteful number, since it uses less digits than its factorization.

20555450542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53232.

The product of its (nonzero) digits is 200000, while the sum is 37.

The spelling of 20555450542 in words is "twenty billion, five hundred fifty-five million, four hundred fifty thousand, five hundred forty-two".