20551554530 has 64 divisors (see below), whose sum is σ = 40609900800. Its totient is φ = 7442046720.

The previous prime is 20551554523. The next prime is 20551554533. The reversal of 20551554530 is 3545515502.

It is not an unprimeable number, because it can be changed into a prime (20551554533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2843261 + ... + 2850479.

It is an arithmetic number, because the mean of its divisors is an integer number (634529700).

Almost surely, 2^20551554530 is an apocalyptic number.

20551554530 is a deficient number, since it is larger than the sum of its proper divisors (20058346270).

20551554530 is a wasteful number, since it uses less digits than its factorization.

20551554530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659.

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 20551554530 in words is "twenty billion, five hundred fifty-one million, five hundred fifty-four thousand, five hundred thirty".