20226693780 has 36 divisors (see below), whose sum is σ = 61354305012. Its totient is φ = 5393784960.

The previous prime is 20226693779. The next prime is 20226693797. The reversal of 20226693780 is 8739662202.

It can be written as a sum of positive squares in 2 ways, for example, as 12106160784 + 8120532996 = 110028^2 + 90114^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56185081 + ... + 56185440.

Almost surely, 2^20226693780 is an apocalyptic number.

20226693780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20226693780 is an abundant number, since it is smaller than the sum of its proper divisors (41127611232).

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

20226693780 is a wasteful number, since it uses less digits than its factorization.

20226693780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112370536 (or 112370531 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20226693780 in words is "twenty billion, two hundred twenty-six million, six hundred ninety-three thousand, seven hundred eighty".