20626061520 has 80 divisors (see below), whose sum is σ = 63988583040. Its totient is φ = 5496172032.

The previous prime is 20626061479. The next prime is 20626061537. The reversal of 20626061520 is 2516062602.

It is a tau number, because it is divible by the number of its divisors (80).

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, 296646 + ... + 359514.

It is an arithmetic number, because the mean of its divisors is an integer number (799857288).

Almost surely, 2^20626061520 is an apocalyptic number.

20626061520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20626061520 is an abundant number, since it is smaller than the sum of its proper divisors (43362521520).

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

20626061520 is a wasteful number, since it uses less digits than its factorization.

20626061520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64252 (or 64246 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 20626061520 in words is "twenty billion, six hundred twenty-six million, sixty-one thousand, five hundred twenty".