20551065510 has 32 divisors (see below), whose sum is σ = 49327817472. Its totient is φ = 5479699680.

The previous prime is 20551065503. The next prime is 20551065527. The reversal of 20551065510 is 1556015502.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 300405 + ... + 362415.

It is an arithmetic number, because the mean of its divisors is an integer number (1541494296).

Almost surely, 2^20551065510 is an apocalyptic number.

20551065510 is an abundant number, since it is smaller than the sum of its proper divisors (28776751962).

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

20551065510 is a wasteful number, since it uses less digits than its factorization.

20551065510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73068.

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 20551065510 in words is "twenty billion, five hundred fifty-one million, sixty-five thousand, five hundred ten".