20153340 has 48 divisors (see below), whose sum is σ = 62700960. Its totient is φ = 5374080.

The previous prime is 20153339. The next prime is 20153351. The reversal of 20153340 is 4335102.

It is a super-2 number, since 2×20153340² = 812314226311200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 18121 + ... + 19200.

It is an arithmetic number, because the mean of its divisors is an integer number (1306270).

Almost surely, 2^20153340 is an apocalyptic number.

20153340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20153340 is an abundant number, since it is smaller than the sum of its proper divisors (42547620).

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

20153340 is a wasteful number, since it uses less digits than its factorization.

20153340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37339 (or 37331 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20153340 is about 4489.2471529200. The cubic root of 20153340 is about 272.1337109315.

Adding to 20153340 its reverse (4335102), we get a palindrome (24488442).

The spelling of 20153340 in words is "twenty million, one hundred fifty-three thousand, three hundred forty".