20701500 has 96 divisors (see below), whose sum is σ = 62078016. Its totient is φ = 5356800.

The previous prime is 20701493. The next prime is 20701511. The reversal of 20701500 is 510702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20701500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55314 + ... + 55686.

It is an arithmetic number, because the mean of its divisors is an integer number (646646).

Almost surely, 2^20701500 is an apocalyptic number.

20701500 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 20701500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31039008).

20701500 is an abundant number, since it is smaller than the sum of its proper divisors (41376516).

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

20701500 is a wasteful number, since it uses less digits than its factorization.

20701500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 20701500 is about 4549.8901085631. The cubic root of 20701500 is about 274.5789700496.

It can be divided in two parts, 2070 and 1500, that added together give a triangular number (3570 = T₈₄).

The spelling of 20701500 in words is "twenty million, seven hundred one thousand, five hundred".