20261007900 has 360 divisors, whose sum is σ = 77488818176. Its totient is φ = 4481308800.

The previous prime is 20261007889. The next prime is 20261007929. The reversal of 20261007900 is 970016202.

It is a super-2 number, since 2×20261007900² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1751937 + ... + 1763463.

Almost surely, 2^20261007900 is an apocalyptic number.

20261007900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20261007900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38744409088).

20261007900 is an abundant number, since it is smaller than the sum of its proper divisors (57227810276).

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

20261007900 is a wasteful number, since it uses less digits than its factorization.

20261007900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11591 (or 11575 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The spelling of 20261007900 in words is "twenty billion, two hundred sixty-one million, seven thousand, nine hundred".