20551242505430 has 64 divisors (see below), whose sum is σ = 47098868826240. Its totient is φ = 6279849160704.

The previous prime is 20551242505399. The next prime is 20551242505457. The reversal of 20551242505430 is 3450524215502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389349179 + ... + 389401958.

It is an arithmetic number, because the mean of its divisors is an integer number (735919825410).

Almost surely, 2^{20551242505430} is an apocalyptic number.

20551242505430 is an abundant number, since it is smaller than the sum of its proper divisors (26547626320810).

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

20551242505430 is a wasteful number, since it uses less digits than its factorization.

20551242505430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778751193.

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 20551242505430 in words is "twenty trillion, five hundred fifty-one billion, two hundred forty-two million, five hundred five thousand, four hundred thirty".