21761136210 has 32 divisors (see below), whose sum is σ = 56974612032. Its totient is φ = 5275426880.

The previous prime is 21761136197. The next prime is 21761136223. The reversal of 21761136210 is 1263116712.

It is an interprime number because it is at equal distance from previous prime (21761136197) and next prime (21761136223).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 32971089 + ... + 32971748.

It is an arithmetic number, because the mean of its divisors is an integer number (1780456626).

Almost surely, 2^21761136210 is an apocalyptic number.

21761136210 is an abundant number, since it is smaller than the sum of its proper divisors (35213475822).

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

21761136210 is a wasteful number, since it uses less digits than its factorization.

21761136210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65942858.

The product of its (nonzero) digits is 3024, while the sum is 30.

The spelling of 21761136210 in words is "twenty-one billion, seven hundred sixty-one million, one hundred thirty-six thousand, two hundred ten".