20552224551 has 32 divisors (see below), whose sum is σ = 29365536000. Its totient is φ = 12746688768.

The previous prime is 20552224549. The next prime is 20552224559. The reversal of 20552224551 is 15542225502.

It is a happy number.

It is not a de Polignac number, because 20552224551 - 2¹ = 20552224549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20552224559) 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, 3794121 + ... + 3799533.

It is an arithmetic number, because the mean of its divisors is an integer number (917673000).

Almost surely, 2^20552224551 is an apocalyptic number.

20552224551 is a deficient number, since it is larger than the sum of its proper divisors (8813311449).

20552224551 is a wasteful number, since it uses less digits than its factorization.

20552224551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6623.

The product of its (nonzero) digits is 40000, while the sum is 33.

The spelling of 20552224551 in words is "twenty billion, five hundred fifty-two million, two hundred twenty-four thousand, five hundred fifty-one".