20219769570 has 256 divisors, whose sum is σ = 68990164992. Its totient is φ = 3650088960.

The previous prime is 20219769569. The next prime is 20219769599. The reversal of 20219769570 is 7596791202.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 490707 + ... + 530313.

It is an arithmetic number, because the mean of its divisors is an integer number (269492832).

Almost surely, 2^20219769570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20219769570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34495082496).

20219769570 is an abundant number, since it is smaller than the sum of its proper divisors (48770395422).

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

20219769570 is a wasteful number, since it uses less digits than its factorization.

20219769570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39665.

The product of its (nonzero) digits is 476280, while the sum is 48.

The spelling of 20219769570 in words is "twenty billion, two hundred nineteen million, seven hundred sixty-nine thousand, five hundred seventy".